It is impossible to imagine a character in stronger contrast with Voltaire, than that of Rousseau. They possessed but one quality in common. It is difficult to know what to call it. In ordinary men it would be named egotism, or vanity. It is that lively and intimate apprehension of their own individuality, sensations, and being, which appears to be one of the elements of that order of minds which feel impelled to express their thoughts and disseminate their views and opinions through the medium of writing;--men of imagination, and eloquence, and mental energy. This quality is good as long as it renders an author diligent, earnest, and sincere; it is evil when it deprives him of the power of justly appreciating his powers and position, and causes him to fancy himself the centre, as it were, of the universe. Rousseau was its victim; it was exaggerated till his mind became diseased; and one false idea becoming fixed and absorbing, a sort of madness ensued. He was too alive to the sense of his own actions and feelings; and as he had committed many faults, not to say crimes, the recollection of these, joined to his sincere love of virtue, produced a struggle in his mind full, of misery and remorse. Jean Jacques Rousseau was born at Geneva, on the 28th June, 1712. His birth cost the life of his mother, and was, he says, "the first of his misfortunes." His father was a watchmaker, and clever in his trade--it was all he had to subsist upon. Jean Jacques was born weakly, and with some organic defect, that rendered the rearing difficult and precarious. A sister of his father devoted herself to him. According to his own account, his childish years were happy. Loved and caressed by many relations, and watched over by his aunt, he was indulged without being spoiled. His father taught him to read, after the business of the day was over. That his attention might be excited, the long romances of Scudéri and the elder Crebillon were put into his hands. His father shared the pleasure he took in this occupation, and parent and child often sat up all night to indulge in it: a taste for the romantic, and a precocious knowledge of the language of passion and sentiment, were thus impressed upon the boy. When the collection of romances was ended, they turned to other books. They had a good collection, being a portion of the library of his mother's father, a minister of the church. The "History of the Church and the Empire," by Le Seur; Bossuet's "Discourse on Universal History;" Plutarch's "Lives;" Ovid's "Metamorphoses;" the works of Molière, La Bruyère, and Fontenelle, were among them. The boy read to his father as he sat at work. [Sidenote: 1720. Ætat. 8.] "I thus," Rousseau writes "imbibed a singular taste, perhaps unexampled at my age. Plutarch, above all, became my favourite reading, and the pleasure I took in it cured me somewhat of my love for romances, and I soon learnt to prefer Agesilas, Brutus, and Aristides, to Oorondates, Artamenes, and Juba.