It is almost everywhere the case that soon after it is begotten the greater part of human wisdom is laid to rest in repositories.

So-called professional mathematicians have, in their reliance on the relative incapacity of the rest of mankind, acquired for themselves a reputation for profundity very similar to the reputation for sanctity possessed by theologians.

What is called an acute knowledge of human nature is mostly nothing but the observer's own weaknesses reflected back from others.

Man is a masterpiece of creation . . .

Erudition can produce foliage without bearing fruit.

To grow wiser means to learn to know better and better the faults to which this instrument with which we feel and judge can be subject.

It is in the gift for employing all the vicissitudes of life to one's own advantage and to that of one's craft that a large part of genius consists.