Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

The wise man will be as happy as circumstances permit, and if he finds the contemplation of the universe painful beyond a point, he will contemplate something else instead.

Be isolated, be ignored, be attacked, be in doubt, be frightened, but do not be silenced.

Truth is for the gods; from our human point of view, it is an ideal, towards which we can approximate, but which we cannot hope to reach.

... the whole world of loneliness, poverty, and pain make a mockery of what human life should be.

Stupidity and unconscious bias often work more damage than venality.

Formality Thus the absence of all mention of particular things or properties in logic or pure mathematics is a necessary result of the fact that this study is, as we say, "purely formal".