“Men are never very wise and select in the exercise of a new power”

“To be a teacher in the right sense is to be a learner. I am not a teacher, only a fellow student”

“The chief object of education is not to learn things but to unlearn things”

“The wise only possess ideas, the great part of mankind are possessed by them”

“I will give you a definition of a proud man: he is a man who has neither vanity nor wisdom, one filled with hatreds cannot be vain, neither can he be wise”

“All noble enthusiasms pass through a feverish stage, and grow wiser and more serene”