Morally, a philosopher who uses his professional competence for anything except a disinterested search for truth is guilty of a kind of treachery.

Extreme hopes are born of extreme misery, and in such a world hopes could only be irrational.

Philosophy is an unusually ingenious attempt to think fallaciously.

The skill of the politician consists in guessing what people can be brought to think advantageous to themselves; the skill of the expert consists in calculating what really is advantageous, provided people can be brought to think so.

This has been my life. I have found it worth living, and would gladly live it again if the second chance were offered me.

Calculus required continuity, and continuity was supposed to require the infinitely little; but nobody could discover what the infinitely little might be.

For my part, the thing I would wish to obtain from money would be leisure with security. But what the typical modern man desires to get with it is more money, with a view to ostentation, splendour, and the outshining of those who have hitherto been his equals.