He was born of poor parents, near Digne, in Provence. In his earliest years he gave promise of his extraordinary genius. At nineteen he was professor of philosophy at Aix. His celebrated “Essays against the Aristotleians” (_Exercitationes Paradoxicæ Adversus Aristoteleos_) was his first appearance in the philosophic world. Written some years earlier, it was first published, in part, in the year 1624. It divides with the _Novum Organon_ of Francis Bacon, with which it was almost contemporary, the honour of being the earliest effectual assault upon the old scholastic jargon which, abusing the name and authority of Aristotle, during some three or four centuries of mediæval darkness had kept possession of the schools and universities of Europe. It at once raised up for Gassendi a host of enemies, the supporters of the old orthodoxy, and, as has always been the case in the exposure of falsehood, he was assailed with a torrent of virulent invective. Five of the Books of the _Exercitationes_, by the advice of his friends, who dreaded the consequences of his courage, had been suppressed. In the Fourth Book, besides the heresy of Kopernik (which Bacon had not the courage or the penetration to adopt), the doctrine of the eternity of the Earth had been maintained, as already taught by Bruno; while the Seventh, according to the table of contents, contained a formal recommendation of the Epicurean theory of morals, in which Pleasure and Virtue are synonymous terms. In the midst of the obloquy thus aroused the philosopher devoted himself, by way of consolation, to the study of anatomy and astronomy, as well as to literary studies. “As the result of his anatomical researches he composed a treatise to prove that man was intended to live upon vegetables, and that animal food, as contrary to the human constitution, is baneful and unwholesome.”[117] He was the first to observe the transit of the planet Mercury over the Sun’s disc (1631), previously calculated by Kepler. He next appears publicly as the opponent of Descartes in his _Disquisitiones Anticartesianæ_ (1643)--a work justly distinguished, according to the remark of an eminent German critic, as a model of controversial excellence. The philosophic world was soon divided between the two hostile camps. It is sufficient to observe here that Descartes, whatever merit may attach to him in other respects, by his equally absurd and mischievous paradox that the non-human species are possessed only of unconscious sensation and perception, had done as much as he well could to destroy his reputation for common sense and common reason with all the really thinking part of the world. Yet this “animated machine” theory, incredible as it may appear, has recently been revived by a well-known physiologist of the present day, in the very face of the most ordinary facts and experience--a theory about which it needs only to be said that it deserves to be classed with some of the most absurd and monstrous