"I perceived it was possible to arrive at knowledge highly useful in life; and that, instead of the speculative philosophy usually taught in the Schools, we might find a practical, by means of which, k…"

"Travelling is almost like talking with those of other centuries."

"Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it."

"The greatest good for each of us is to live freely and happily."

"I entirely abandoned the study of letters, resolving to seek no other science than that which could be found in myself, or at least in the great book of the world."