Jean Jacques Rousseau was born at Geneva in the year 1712, when Voltaire was first rising into notice. He belonged to the plebeian ranks, being the son of a watchmaker; was sickly, miserable, and morbid from a child; was poorly educated, but a great devourer of novels (which his father--sentimental as he--read with him), poetry, and gushing biographies; although a little later he became, with impartial facility, equally delighted with the sturdy Plutarch. His nature was passionate and inconstant, his sensibilities morbidly acute, and his imagination lively. He hated all rules, precedents, and authority. He was lazy, listless, deceitful, and had a great craving for novelties and excitement,--as he himself says, "feeling everything and knowing nothing." At an early age, without money or friends, he ran away from the engraver to whom he had been apprenticed, and after various adventures was first kindly received by a Catholic priest in Savoy; then by a generous and erring woman of wealth lately converted to Catholicism; and again by the priests of a Catholic Seminary in Sardinia, under whose tuition, and in order to advance his personal fortunes, he abjured the religion in which he had been brought up, and professed Catholicism. This, however, cost him no conscientious scruples, for his religious training had been of the slimmest, and principles he had none. We next see Rousseau as a footman in the service of an Italian Countess, where he was mean enough to accuse a servant girl of a theft he had himself committed, thereby causing her ruin. Again, employed as a footman in the service of another noble family, his extraordinary talents were detected, and he was made secretary. But all this kindness he returned with insolence, and again became a wanderer. In his isolation he sought the protection of the Swiss lady who had before befriended him, Madame de Warens. He began as her secretary, and ended in becoming her lover. In her house he saw society and learned music. A fit of caprice induced Rousseau to throw up this situation, and he then taught music in Chambéry for a living, studied hard, read Voltaire, Descartes, Locke, Hobbes, Leibnitz, and Puffendorf, and evinced an uncommon vivacity and talent for conversation, which made him a favorite in social circles. His chief labor, however, for five years was in inventing a system of musical notation, which led him to Lyons, and then, in 1741, to Paris.