- Gassendi also spelled:
- Gassend
- Born:
- January 22, 1592, Champtercier, Provence, France
- Died:
- October 24, 1655, Paris (aged 63)
- Notable Works:
- “Syntagma philosophicum”
- Movement / Style:
- Epicureanism
- atomism
- Subjects Of Study:
- Epicurus
Pierre Gassendi
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Who was Pierre Gassendi?
Pierre Gassendi (1592-1655) was a French mathematician, philosopher, and scientist who sought to revive Epicureanism as a substitute for Aristotelianism, while also reconciling mechanistic atomism with Christian belief.
Gassendi critiqued René Descartes's metaphysics, arguing against the certainty of innate ideas. He was appointed professor of mathematics at the Collège Royal in Paris in 1645. Gassendi's works include Institutio astronomica juxta hypotheseis tam veteram quam Copernici et Tychonis Brahei (1647), De vita et moribus Epicuri (1647), Animadversiones in decimum librum Diogenis Laërtii (1649), and the posthumously published Syntagma philosophicum (1658).
Gassendi aimed to reconcile skepticism and dogmatism, suggesting that while metaphysical knowledge of essences is impossible, probable knowledge of the natural world can be acquired through induction. Although a heliocentrist, Gassendi presented his astronomical views to be consistent with church teachings. His atomism was eventually superseded by Isaac Newton's physics.
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What subjects did Pierre Gassendi study and work in?
Pierre Gassendi was a French philosopher, scientist, and mathematician who lived from 1592 to 1655. Gassendi received a doctorate in theology in 1614 and was appointed professor of philosophy at Aix-en-Provence in 1616.
In 1645, he became a professor of mathematics at the Collège Royal in Paris. Throughout his career, Gassendi engaged in scientific studies, including astronomical observations such as discovering Mercury's perihelion in 1631. He also commented on the manuscript of René Descartes’s Meditations.
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What were some of Gassendi's important scientific ideas?
Pierre Gassendi was a French philosopher, scientist, and mathematician who lived from 1592 to 1655.
Gassendi revived Epicureanism as a substitute for Aristotelianism, while reconciling mechanistic atomism with Christian belief. He argued against René Descartes's concept of innate ideas. Gassendi also sought a middle ground between skepticism and dogmatism, suggesting that while metaphysical knowledge of essences is impossible, one can still acquire probable knowledge of the natural world through induction and observation.
Although Gassendi was a heliocentrist, he presented his astronomical views in a way that made them consistent with the teachings of the church, which had condemned Galileo for his heliocentrism in 1633. Although Gassendi’s atomism was a complete account of nature for the time, his scientific program did not lead to any major discoveries, and was eventually replaced by the physics of Isaac Newton.
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How did Gassendi's philosophy differ from other thinkers of his time?
Pierre Gassendi sought a middle ground between skepticism and dogmatism, differing from contemporaries through his unique blend of skepticism and atomism.
While he shared the era's interest in reconciling science and religion, Gassendi critiqued René Descartes's rationalism, objecting to innate ideas and emphasizing empirical observation. Gassendi argued that while metaphysical knowledge of essences is impossible, one can still acquire probable knowledge of the natural world via observation. Gassendi revived Epicurean atomism, proposing that the world consists of eternal, differently shaped atoms in motion, contrasting with Aristotelian teleology by explaining phenomena through mechanical models, not purposes.
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What was Gassendi's role in the development of modern science?
Pierre Gassendi (1592–1655) was a French philosopher, scientist, and mathematician who played a significant role in the development of modern science by reviving Epicureanism as an alternative to Aristotelianism. Gassendi's contribution includes his critique of René Descartes's metaphysics, arguing against the certainty of innate ideas.
Gassendi's advocacy for atomism, a theory that posits the existence of eternal and differently shaped atoms, offered a mechanical model for explaining natural phenomena, influencing the development of probabilistic empirical laws. Though his atomistic views were eventually superseded by Newtonian physics, Gassendi's ideas were notably influential in the 17th century, shaping the thoughts of empiricists like John Locke and contributing to the early development of fields like botany and geology.
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How have Gassendi's ideas influenced later scientists and philosophers?
Pierre Gassendi's ideas significantly influenced the 17th century. His works, though initially published in Latin, were later abridged in French and translated into English, which allowed his teachings to spread to Jesuit schools, English universities, and even schools in North America.
Gassendi's epistemological views appear in John Locke’s Essay Concerning Human Understanding (1690), linking Gassendi to the foundations of British empiricism. His Syntagma philosophicum was published in English in Thomas Stanley’s History of Philosophy (1655–62), a work known to Locke. Locke also encountered Gassendi’s disciples during his time in France.
Gassendi’s critique of Cartesianism and his scientific research have sparked growing interest, highlighting his contributions to the early development of botany, geology, and other fields. Today, Gassendi is recognized as a highly original thinker.
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Pierre Gassendi (born January 22, 1592, Champtercier, Provence, France—died October 24, 1655, Paris) was a French philosopher, scientist, and mathematician, who revived Epicureanism as a substitute for Aristotelianism, attempting in the process to reconcile mechanistic atomism with the Christian belief in an infinite God.
Early life and career
Born into a family of commoners, Gassendi received his early education at Digne and Reiz. He studied at universities in Digne and Aix-en-Provence and received a doctorate in theology at the university in Avignon in 1614. After being ordained a priest in 1616 he was appointed professor of philosophy at Aix-en-Provence. There he delivered critical lectures on the thought of Aristotle from 1617 to 1622, when the new Jesuit authorities of the university, who disapproved of Gassendi’s anti-Aristotelianism, compelled him to leave. Gassendi’s work Exercitationes paradoxicae adversus Aristoteleos (“Paradoxical Exercises Against the Aristotelians”), the first part of which was published in 1624, contains an attack on Aristotelianism and an early version of his mitigated skepticism. Gassendi thereafter engaged in many scientific studies with his patron, Nicolas-Claude Fabri de Peiresc, until the latter’s death in 1637. A considerable portion of his researches during this period involved astronomical observations, including his discovery in 1631 of the perihelion of Mercury (the point of the planet’s closest approach to the Sun).
Skepticism and atomism
In 1641 the theologian and mathematician Marin Mersenne invited Gassendi and several other eminent thinkers to contribute comments on the manuscript of René Descartes’s Meditations (1641); Gassendi’s comments, in which he argued that Descartes had failed to establish the reality and certainty of innate ideas, were published in the second edition of the Meditations (1642) as the fifth set of objections and replies. Gassendi enlarged upon these criticisms in his Disquisitio metaphysica, seu duitationes et instantiae adversus Renati Cartesii metaphysicam et responsa (1644; “Metaphysical Disquisition; or, Doubts and Instances Against the Metaphysics of René Descartes and Responses”).
In 1645 Gassendi was appointed professor of mathematics at the Collège Royal in Paris. During the remainder of the decade he published a work on the new astronomy, Institutio astronomica juxta hypotheseis tam veteram quam Copernici et Tychonis Brahei (1647; “Astronomical Instruction According to the Ancient Hypotheses as Well as Those of Copernicus and Tycho Brahe”), as well as two of his three major works on Epicurean philosophy, De vita et moribus Epicuri (1647; “On the Life and Death of Epicurus”) and Animadversiones in decimum librum Diogenis Laertii, qui est de vita, moribus, placitisque Epicuri (1649; “Observations on Book X of Diogenes Laërtius, Which Is About the Life, Morals, and Opinions of Epicurus”).
In his final Epicurean work, Syntagma philosophicum (“Philosophical Treatise”), published posthumously in 1658, Gassendi attempted to find what he called a middle way between skepticism and dogmatism. He argued that, while metaphysical knowledge of the “essences” (inner natures) of things is impossible, by relying on induction and the information provided by “appearances” one can acquire probable knowledge of the natural world that is sufficient to explain and predict experience. Adopting a view characteristic of ancient Skepticism, Gassendi held that experienced events can be taken as signs of what is beyond experience. Smoke suggests fire, sweat suggests that there are pores in the skin, and the multitude of events suggests that there is an atomic world underlying them. The best theory of such a world, in Gassendi’s opinion, is the ancient atomism expounded by Epicurus (341–270 bce), according to which atoms are eternal, differently shaped, and moving at different speeds. Gassendi argued that such atoms must have some of the physical features of the visible objects they constitute, such as extension, size, shape, weight, and solidity. The atoms collide and agglomerate, resulting in events in the perceptible world. A mechanical model of atomic movement and agglomeration, ultimately based on experience, would allow one to discover probabilistic empirical laws, to make predictions, and to explain relationships between different kinds of phenomena. Because the phenomenal world is thus related to the atomic world, there is no need to explain events in terms of purposes, goals, or final causes, as in Scholastic and Aristotelian teleology.
Gassendi believed that there was no conflict between his mechanistic atomism and the doctrines of Roman Catholicism; indeed, he took pains to emphasize their compatibility. Although he was a heliocentrist, he presented his astronomical views in a way that made them at least superficially consistent with the teachings of the church, which had condemned Galileo for his heliocentrism in 1633.
Although Gassendi’s atomism was as complete an account of nature as any other scientific theory of its time, it was eventually replaced by the physics of Sir Isaac Newton. No important discoveries are attributed to Gassendi’s scientific program.
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Religious and moral views
Gassendi rejected the Epicurean account of the human soul, according to which it is material but composed of lighter and more subtle atoms than those of other things. Souls are genuinely immaterial, and their existence is known through faith. Likewise, his theology, unlike Epicurus’s, did not conceive of God as a material body. God’s existence is proved by the harmony evident in nature. Following Epicurus, Gassendi held that the proper goal of human life is happiness, which consists in the peace of the soul and the absence of bodily pain.
It has long been debated whether Gassendi was really a secret libertine—a freethinker in matters of religion and morals. Although he was a close associate of some notorious religious skeptics and even took part in their retreats, he was also good friends with some leading church figures, such as the theologian and mathematician Marin Mersenne. Indeed, Gassendi and Mersenne had quite similar views about science and its foundations. Gassendi’s associations with a wide range of other intellectual figures, including Thomas Hobbes and Blaise Pascal, lend themselves to varied interpretations.
Influence and assessment
In 1648 Gassendi resigned his post at the Collège Royal because of poor health. After nearly five years in Provence he returned to Paris in 1653, taking up residence in the house of his new patron, Henri-Louis Habert, lord of Montmor. He died there two years later.
Gassendi’s ideas were extremely influential in the 17th century. Although his works were originally published as huge Latin tomes, a French abridgement of them appeared in the second half of the century, as did English translations of various excerpts. His ideas were taught in Jesuit schools in France, in English universities, and even in newly founded schools in North America. Because Gassendi’s epistemological views seem to be echoed in major sections of John Locke’s Essay Concerning Human Understanding (1690), one of the founding works of British empiricism, some scholars have concluded that Locke was directly influenced by Gassendi. It is interesting to note in this connection that the Syntagma was published in English in Thomas Stanley’s History of Philosophy (1655–62), a work that Locke knew. Locke also met some of Gassendi’s disciples during his exile in France.
At the turn of the 21st century there was growing interest in Gassendi’s critique of Cartesianism, and his scientific researches were shedding new light on the early development of botany, geology, and other fields. He is now regarded as an original thinker of the first rank.