Dava Sobel - Galileo's Daughter

"Propositions arrived at purely by logical means are completely empty as regards reality. Because Galileo saw this, and particularly because he drummed it into the scientific world, he is the father of modern physics--indeed of modern science." --Albert Einstein as quoted on page 326
Galileo's Daughter is misnamed. It is, at best, a co-biography. But even if one were to call it that, the vast majority of the text deals with Galileo rather than his daughter. Perhaps a more accurate title would have been Galileo and his Daughter. Ever since reading Galileo at Work several years ago I've been looking for a good biography of this amazing man. Well, this is it. Sobel is a good story teller, and this is a great story.

While it is interesting to see what Galileo's daughter, Virginia--later renamed Suor Maria Celeste when she became a nun, thought of her unmarried father, the insights into her true self are difficult to come by even through the many letters that remain. (For a candid recounting of the experiences of being a nun, I highly recommend Karen Armstrong's Through the Narrow Gate.) Galileo's Daughter is the first time Sour Maria Celeste's letters have been made available in English. Although they are very well written and frequently contain interesting tidbits, I found myself skimming through those found in the last quarter of the book rather quickly. One can read only so many requests for money before they become tedious. If it was a book of only her letters, I could not have finished it. But Sobel weaves much interesting dialogue and analysis in between the letters. Very unfortunately, we don't have any of Galileo's responses to his daughter's letters.

Galileo, either through nurture, nature, or a combination of the two, developed a personal philosophy much like his father's. His father wrote in Dialogue of Ancient and Modern Music the following:

It appears to me that they who in proof of any assertion rely simply on the weight of authority, without adducing any argument in support of it, act very absurdly. I, on the contrary, wish to be allowed freely to question and freely to answer you without any sort of adulation, as well becomes those who are in search of truth. (as quoted on page 17)
In a sense, Galileo spent a great deal of his life at odds with Aristotle who was by the 16th and 17th centuries incorporated not only into the philosophies and thoughts of the educated but also part and parcel to many doctrines and dogmas of the Catholic Church. Saint Thomas Aquinas was largely responsible for melding Aristotle with Christian doctrine even though Aristotle lived hundreds of years before Jesus. Galileo wanted to prove things via superior methodologies. He relied on experiment whenever possible.
I cannot but be astonished that [someone] should persist in trying to prove by means of witnesses something that I may see for myself at any time by means of experiment... even in conclusions which can be known only by reasoning, I say that the testimony of many has little more value than that of few, since the number of people who reason well in complicated matters is much smaller than that of those who reason badly. If reasoning were like hauling I should agree that several reasoners would be worth more than one, just as several horses can haul more sacks of grain than one can. But reasoning is like racing and not like hauling, and a single Barbary steed can outrun a hundred dray horses. (p. 92, originally from The Assayer)
Although remaining a theist and devoted Catholic his entire life, Galileo sometimes objected to always relying solely on "authority" or traditional belief--especially if the issue at hand was a scientific rather than religious question. As he stated in his final book, Two New Sciences, "to understand why [something] happens far outweighs the mere information obtained by the testimony of others or even by repeated experiment." (as quoted on page 337)

Sobel doesn't skimp on Galileo's most famous moment.

There was only one trial of Galileo, and yet it seems there were a thousand--the suppression of science by religion, the defense of individualism against authority, the clash between revolutionary and establishment, the challenge of radical new discoveries to ancient beliefs, the struggle against intolerance for freedom of thought and freedom of speech. No other process in the annals of canon or common law has ricocheted through history with more meanings, more consequences, more conjecture, more regrets. (p. 232)
The reader is treated to an excellent analysis of Galileo's summons before the Holy Office of the Inquisition. Included are some of the key actual transcripts from the proceedings. While reading this book I was, ironically, called before a somewhat similar inquisition of the Mormon church for maintaining this website. Luckily, churches no longer have the power to do much more than make idle threats and excommunicate.

The main focus of the book, though, is on his relationship with his daughter. This is different than his other biographies which zoom in closer on his scientific achievements or conflicts with Pope Urban.

...all the while that Galileo was inventing modern physics, teaching mathematics to princes, discovering new phenomena among the planets, publishing science books for the general public, and defending his bold theories against establishment enemies, he was also buying thread for Suor Luisa, choosing organ music for Mother Achillea, shipping gifts of food, and supplying his homegrown citrus fruits, wine, and rosemary leaves for the kitchen and apothecary at San Matteo [convent]. (p. 118)
I highly recommend Galileo's Daughter. It is a fabulous story told by a very talented author.
"It is difficult today--from a vantage point of insignificance on this small planet of an ordinary star set along a spiral arm of one galaxy among billions in an infinite cosmos--to see the Earth as the center of the universe. Yet that is where Galileo found it." --p. 49

from the publisher:
Inspired by a long fascination with Galileo, and by the remarkable surviving letters of Galileo's daughter, a cloistered nun, Dava Sobel has written a biography unlike any other of the man Albert Einstein called "the father of modern physics--indeed of modern science altogether." Galileo's Daughter also presents a stunning portrait of a person hitherto lost to history, described by her father as "a woman of exquisite mind, singular goodness, and most tenderly attached to me."

The son of a musician, Galileo Gahlei (1564-1642) tried at first to enter a monastery before engaging the skills that made him the foremost scientist of his day. Though he never left Italy, his inventions and discoveries were heralded around the world. Most sensationally, his telescopes allowed him to reveal a new reality in the heavens and to reinforce the astounding argument that the Earth moves around the Sun. For this belief, he was brought before the Holy Office of the Inquisition, accused of heresy, and forced to spend his last years under house arrest.

Of Galileo's three illegitimate children, the eldest best mirrored his own brilliance, industry, and sensibility, and by virtue of these qualities became his confidante. Born Virginia in 1600, she was thirteen when Galileo placed her in a convent near him in Florence, where she took the most appropriate name of Suor Maria Celeste. Her loving support, which Galileo repaid in kind, proved to be her father's greatest source of strength throughout his most productive and tumultuous years. Her presence, through letters which Sobel has translated from their original Italian and masterfully woven into the narrative, graces her father's life now as it did then.

Galileo's Daughter dramatically recolors the personality and accomplishment of a mythic figure whose seventeenth-century clash with Catholic doctrine continues to define the schism between science and religion. Moving between Galileo's grand public life and Maria Celeste's sequestered world, Sobel illuminates the Florence of the Medicis and the papal court in Rome during the pivotal era when humanity's perception of its place in the cosmos was being overturned. In that same time, while the bubonic plague wreaked its terrible devastation and the Thirty Years' War tipped fortunes across Europe, one man sought to reconcile the Heaven he revered as a good Catholic with the heavens he revealed through his telescope.

With all the human drama and scientific adventure that distinguished Longitude, Galileo's Daughter is an unforgettable story.

Author
Dava Sobel
is the author of the international bestseller Longitude and coauthor of The Illustrated Longitude. She lives in East Hampton, New York.

Excerpt

She Who Was So Precious to You

MOST ILLUSTRIOUS LORD FATHER 

We are terribly saddened by the death of your cherished sister, our dear aunt; but our sorrow at losing her is as nothing compared to our concern for your sake, because your suffering will be all the greater, Sire, as truly you have no one else left in your world, now that she, who could not have been more precious to you, has departed, and therefore we can only imagine how you sustain the severity of such a sudden and completely unexpected blow. And while I tell you that we share deeply in your grief, you would do well to draw even greater comfort from contemplating the general state of human misery, since we are all of us here on Earth like strangers and wayfarers, who soon will be bound for our true homeland in Heaven, where there is perfect happiness, and where we must hope that your sister's blessed soul has already gone. Thus, for the love of God, we pray you, Sire, to be consoled and to put yourself in His hands, for, as you know so well, that is what He wants of you; to do otherwise would be to injure yourself and hurt us, too, because we lament grievously when we hear that you are burdened and troubled, as we have no other source of goodness in this world but you. 

I will say no more, except that with all our hearts we fervently pray the Lord to comfort you and be with you always, and we greet you dearly with our ardent love. 

FROM SAN MATTEO, THE 10TH DAY OF MAY 1623. 
Most affectionate daughter, 
S. Maria Celeste 

The day after his sister Virginia's funeral, the already world-renowned scientist Galileo Galilei received this, the first of 124 surviving letters from the once-voluminous correspondence he carried on with his elder daughter. She alone of Galileo's three children mirrored his own brilliance, industry, and sensibility, and by virtue of these qualities became his confidante. 

Galileo's daughter, born of his long illicit liaison with the beautiful Marina Gamba of Venice, entered the world in the summer heat of a new century, on August 13, 1600--the same year the Dominican friar Giordano Bruno was burned at the stake in Rome for insisting, among his many heresies and blasphemies, that the Earth traveled around the Sun, instead of remaining motionless at the center of the universe. In a world that did not yet know its place, Galileo would engage this same cosmic conflict with the Church, treading a dangerous path between the Heaven he revered as a good Catholic and the heavens he revealed through his telescope. 

Galileo christened his daughter Virginia, in honor of his "cherished sister." But because he never married Virginia's mother, he deemed the girl herself unmarriageable. Soon after her thirteenth birthday, he placed her at the Convent of San Matteo in Arcetri, where she lived out her life in poverty and seclusion. 

Virginia adopted the name Maria Celeste when she became a nun, in a gesture that acknowledged her father's fascination with the stars. Even after she professed a life of prayer and penance, she remained devoted to Galileo as though to a patron saint. The doting concern evident in her condolence letter was only to intensify over the ensuing decade as her father grew old, fell more frequently ill, pursued his singular research nevertheless, and published a book that brought him to trial by the Holy Office of the Inquisition. 

The "we" of Suor Maria Celeste's letter speaks for herself and her sister, Livia--Galileo's strange, silent second daughter, who also took the veil and vows at San Matteo to become Suor Arcangela. Meanwhile their brother, Vincenzio, the youngest child of Galileo and Marina's union, had been legitimized in a fiat by the grand duke of Tuscany and gone off to study law at the University of Pisa. 

Thus Suor Maria Celeste consoled Galileo for being left alone in his world, with daughters cloistered in the separate world of nuns, his son not yet a man, his former mistress dead, his family of origin all deceased or dispersed. 

Galileo, now fifty-nine, also stood boldly alone in his world-view, as Suor Maria Celeste knew from reading the books he wrote and the letters he shared with her from colleagues and critics all over Italy, as well as from across the continent beyond the Alps. Although her father had started his career as a professor of mathematics, teaching first at Pisa and then at Padua, every philosopher in Europe tied Galileo's name to the most startling series of astronomical discoveries ever claimed by a single individual. 

In 1609, when Suor Maria Celeste was still a child in Padua, Galileo had set a telescope in the garden behind his house and turned it skyward. Never-before-seen stars leaped out of the darkness to enhance familiar constellations; the nebulous Milky Way resolved into a swath of densely packed stars; mountains and valleys pockmarked the storied perfection of the Moon; and a retinue of four attendant bodies traveled regularly around Jupiter like a planetary system in miniature. 

"I render infinite thanks to God," Galileo intoned after those nights of wonder, "for being so kind as to make me alone the first observer of marvels kept hidden in obscurity for all previous centuries." 

The newfound worlds transformed Galileo's life. He won appointment as chief mathematician and philosopher to the grand duke in 1610, and moved to Florence to assume his position at the court of Cosimo de' Medici. He took along with him his two daughters, then ten and nine years old, but he left Vincenzio, who was only four when greatness descended on the family, to live a while longer in Padua with Marina. 

Galileo found himself lionized as another Columbus for his conquests. Even as he attained the height of his glory, however, he attracted enmity and suspicion. For instead of opening a distant land dominated by heathens, Galileo trespassed on holy ground. Hardly had his first spate of findings stunned the populace of Europe before a new wave followed: He saw dark spots creeping continuously across the face of the Sun, and "the mother of loves," as he called the planet Venus, cycling through phases from full to crescent, just as the Moon did. 

All his observations lent credence to the unpopular Sun-centered universe of Nicolaus Copernicus, which had been introduced over half a century previously, but foundered on lack of evidence. Galileo's efforts provided the beginning of a proof. And his flamboyant style of promulgating his ideas--sometimes in bawdy humorous writings, sometimes loudly at dinner parties and staged debates--transported the new astronomy from the Latin Quarters of the universities into the public arena. In 1616, a pope and a cardinal inquisitor reprimanded Galileo, warning him to curtail his forays into the supernal realms. The motions of the heavenly bodies, they said, having been touched upon in the Psalms, the Book of Joshua, and elsewhere in the Bible, were matters best left to the Holy Fathers of the Church. 

Galileo obeyed their orders, silencing himself on the subject. For seven cautious years he turned his efforts to less perilous pursuits, such as harnessing his Jovian satellites in the service of navigation, to help sailors discover their longitude at sea. He studied poetry and wrote literary criticism. Modifying his telescope, he developed a compound microscope. "I have observed many tiny animals with great admiration," he reported, 11 among which the flea is quite horrible, the gnat and the moth very beautiful; and with great satisfaction I have seen how flies and other little animals can walk attached to mirrors, upside down." 

Shortly after his sister's death in May of 1623, however, Galileo found reason to return to the Sun-centered universe like a moth to a flame. That summer a new pope ascended the throne of Saint Peter in Rome. The Supreme Pontiff Urban VIII brought to the Holy See an intellectualism and an interest in scientific investigation not shared by his immediate predecessors. Galileo knew the man personally--he had demonstrated his telescope to him and the two had taken the same side one night in a debate about floating bodies after a banquet at the Florentine court. Urban, for his part, had admired Galileo so long and well that he had even written a poem for him, mentioning the sights revealed by "Galileo's glass." 

The presence of the poet pope encouraged Galileo to proceed with a long-planned popular dissertation on the two rival theories of cosmology: the Sun-centered and the Earth-centered, or, in his words, the "two chief systems of the world." 

It might have been difficult for Suor Maria Celeste to condone this course--to reconcile her role as a bride of Christ with her father's position as potentially the greatest enemy of the Catholic Church since Martin Luther. But instead she approved of his endeavors because she knew the depth of his faith. She accepted Galileo's conviction that God had dictated the Holy Scriptures to guide men's spirits but proffered the unraveling of the universe as a challenge to their intelligence. Understanding her father's prodigious capacity in this pursuit, she prayed for his health, for his longevity, for the fulfillment of his "every just desire." As the convent's apothecary, she concocted elixirs and pills to strengthen him for his studies and protect him from epidemic diseases. Her letters, animated by her belief in Galileo's innocence of any heretical depravity, carried him through the ordeal of his ultimate confrontation with Urban and the Inquisition in 1633. 

No detectable strife ever disturbed the affectionate relationship between Galileo and his daughter. Theirs is not a tale of abuse or rejection or intentional stifling of abilities. Rather, it is a love story, a tragedy, and a mystery. 

Most of Suor Maria Celeste's letters traveled in the pocket of a messenger, or in a basket laden with laundry, sweetmeats, or herbal medicines, across the short distance from the Convent of San Matteo, on a hillside just south of Florence, to Galileo in the city or at his suburban home. Following the angry papal summons to Rome in 1632, however, the letters rode on horseback some two hundred miles and were frequently delayed by quarantines imposed as the Black Plague spread death and dread across Italy. 

Gaps of months' duration disrupt the continuity of the reportage in places, but every page is redolent of daily life, down to the pain of toothache and the smell of vinegar. 

Galileo held on to his daughter's missives indiscriminately, collecting her requests for fruits or sewing supplies alongside her outbursts on ecclesiastical politics. Similarly, Suor Maria Celeste saved all of Galileo's letters, as rereading them, she often reminded him, gave her great pleasure. By the time she received the last rites, the letters she had gathered over her lifetime in the convent constituted the bulk of her earthly possessions. But then the mother abbess, who would have discovered Galileo's letters while emptying Suor Maria Celeste's cell, apparently buried or burned them out of fear. After the celebrated trial at Rome, a convent dared not harbor the writings of a "vehemently suspected" heretic. In this fashion, the correspondence between father and daughter was long ago reduced to a monologue. 

Standing in now for all the thoughts he once expressed to her are only those he chanced to offer others about her. "A woman of exquisite mind," Galileo described her to a colleague in another country, "singular goodness, and most tenderly attached to me." 

On first learning of Suor Maria Celeste's letters, people generally assume that Galileo's replies must lie concealed somewhere in the recesses of the Vatican Library, and that if only an enterprising outsider could gain access, the missing half of the dialogue would be found. But, alas, the archives have been combed, several times, by religious authorities and authorized researchers all desperate to hear the paternal tone of Galileo's voice. These seekers have come to accept the account of the mother abbess's destruction of the documents as the most reasonable explanation for their disappearance. The historical importance of any paper signed by Galileo, not to mention the prices such articles have commanded for the past two centuries, leaves few conceivable places where whole packets of his letters could hide. 

Although numerous commentaries, plays, poems, early lectures, and manuscripts of Galileo's have also disappeared (known only by specific mentions in more than two thousand preserved letters from his contemporary correspondents), his enormous legacy includes his five most important books, two of his original handmade telescopes, various portraits and busts he sat for during his lifetime, even parts of his body preserved after death. (The middle finger of his right hand can be seen, encased in a gilded glass egg atop an inscribed marble pedestal at the Museum of the History of Science in Florence.) 

Of Suor Maria Celeste, however, only her letters remain. Bound into a single volume with cardboard and leather covers, the frayed, deckle-edged pages now reside among the rare manuscripts at Florence's National Central Library. The handwriting throughout is still legible, though the once-black ink has turned brown. Some letters bear annotations in Galileo's own hand, for he occasionally jotted notes in the margins about the things she said and at other times made seemingly unrelated calculations or geometric diagrams in the blank spaces around his address on the verso. Several of the sheets are marred by tiny holes, torn, darkened by acid or mildew, smeared with spilled oil. Of those that are water-blurred, some obviously ventured through the rain, while others look more likely tear-stained, either during the writing or the reading of them. After nearly four hundred years, the red sealing wax still sticks to the folded corners of the paper. 

These letters, which have never been published in translation, recast Galileo's story. They recolor the personality and conflict of a mythic figure, whose seventeenth-century clash with Catholic doctrine continues to define the schism between science and religion. For although science has soared beyond his quaint instruments, it is still caught in his struggle, still burdened by an impression of Galileo as a renegade who scoffed at the Bible and drew fire from a Church blind to reason. 

This pervasive, divisive power of the name Galileo is what Pope John Paul II tried to tame in 1992 by reinvoking his torment so long after the fact. "A tragic mutual incomprehension," His Holiness observed of the 350-year Galileo affair, "has been interpreted as the reflection of a fundamental opposition between science and faith." 

Yet the Galileo of Suor Maria Celeste's letters recognized no such division during his lifetime. He remained a good Catholic who believed in the power of prayer and endeavored always to conform his duty as a scientist with the destiny of his soul. "Whatever the course of our lives," Galileo wrote, "we should receive them as the highest gift from the hand of God, in which equally reposed the power to do nothing whatever for us. Indeed, we should accept misfortune not only in thanks, but in infinite gratitude to Providence, which by such means detaches us from an excessive love for Earthly things and elevates our minds to the celestial and divine."

Copyright 1999 Dava Sobel