Why is man alone subject to becoming an imbecile? Is it not that he thereby returns to his primitive state, and that, while the animal which has acqu… - Jean-Jacques Rousseau

My illusions about the world caused me to think that in order to benefit by my reading I ought to possess all the knowledge the book presupposed. I was very far indeed from imagining that often the author did not possess it himself, but had extracted it from other books, as and when he needed it. This foolish conviction forced me to stop every moment, and to rush incessantly from one book to another; sometimes before coming to the tenth page of the one I was trying to read I should, by this extravagant method, have had to run through whole libraries. Nevertheless I stuck to it so persistently that I wasted infinite time, and my head became so confused that I could hardly see or take in anything.

Doubt with regard to what we ought to know is a condition too violent for the human mind; it cannot long be endured; in spite of itself the mind decides one way or another, and it prefers to be deceived rather than to believe nothing.

En vérité, je ne songeais guère à faire ni comme les autres ni autrement qu'eux. Je désirais sincèrement de faire ce qui était bien.