I can only say that, while my own opinions as to ethics do not satisfy me, other people's satisfy me still less.

One is always a little afraid of love, but above all, one is afraid of pain or causing pain.

A democrat need not believe that the majority will always reach a wise decision. He should however believe in the necessity of accepting the decision of the majority, be it wise or unwise, until such a time that the majority reaches another decision.

All the conditions of happiness are realized in the life of the man of science.

The man who has fed the chicken every day throughout its life at last wrings its neck instead, showing that more refined views as to the uniformity of nature would have been useful to the chicken.

The most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition.

To a mind of sufficient intellectual power, the whole of mathematics would appear trivial, as trivial as the statement that a four-footed animal is an animal.