I had been nourished on letters from my infancy, but as soon as I had finished the customary course of study, I found myself hampered by so many doubts and errors that I seemed to have reaped no benefits, except that I had observed more and more of my ignorance: Yet I was at one of the most celebrated schools in Europe, and I was not held inferior to my fellow-students, some of whom were destined to take the place of our masters; nor did our age seem less fruitful of good wits than any which had gone before. Though I did not cease to esteem the studies of the schools, I began to think that I had given enough time to languages, enough also to ancient books, their stories and their fables; for when a man spends too much time in travelling abroad he becomes a stranger in his own country; and so, when he is too curious concerning what went on in past ages, he is apt to remain ignorant of what is taking place in his own day. I set a high price on eloquence, and I was in love with poetry; above all, I rejoiced in mathematics, but I knew nothing of its true use. I revered our theology, but, since the way to heaven lies open to the ignorant no less than to the learned, and the revealed truths which lead thither are beyond our intelligence, I did not dare to submit them to my feeble reasonings. In philosophy there is no truth which is not disputed, and which, consequently, is not doubtful; and, as to the other sciences, they all borrow their principles from philosophy. Therefore, I entirely gave up the study of letters, and employed the rest of my youth in travelling, being resolved to seek no other science than that which I might find within myself, or in the Great Book of the World. Here the best lesson that I learned was not to believe too firmly anything of which I had learnt merely by example and custom; and thus little by little was delivered from many errors which are liable to obscure the light of nature, and to diminish our capacity of hearing reason. Finally, I resolved one day to study myself in the same way, and in this it seems to me I succeeded much better than if I had never departed from either my country or my books. _II.--THE INTELLECTUAL CRISIS_