The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

Education is what is left after you've forgotten everything you've learned.

For the most part, I do the thing which my own nature prompts me to do. It is embarrassing to earn so much respect and love for it.

An autocratic system of coercion, in my opinion, soon degenerates. For force always attracts men of low morality, and I believe it to be an invariable rule that tyrants of genius are succeeded by scoundrels. For this reason I have always been passionately opposed to systems such as we see in Italy and Russia to-day.

I learned many years ago never to waste time trying to convince my colleagues.

One cannot learn so well as by experiencing it oneself.

Let every man judge according to his own standards, by what he has himself read, not by what others tell him.