He who can, does. He who cannot, teaches.

When the world goes mad, one must accept madness as sanity; since sanity is, in the last analysis, nothing but the madness on which the whole world happens to agree.

You may well ask me why...I took the time to write [books]. I can only reply that I do not know. There was no why about it. I had to: that was all.

Better never than late.

Every girl has a right to be loved.

Vivisection is a social evil because if it advances human knowledge, it does so at the expense of human character.

It is not true that men can be divided into absolutely honest persons and absolutely dishonest ones. Our honesty varies with the strain put on it.