I did not, however, commit suicide, because I wished to know more of mathematics.

As men begin to grow civilized, they cease to be satisfied with mere taboos.

Organized people are just too lazy to look for things

I often long to . . . give up my life to love of my neighbour. This is really a temptation.

What is best in mathematics deserves not merely to be learnt as a task, but to assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.

The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.

Philosophy arises from an unusually obstinate attempt to arrive at real knowledge. What passes for knowledge in ordinary life suffers from three defects: it is cocksure, vague and self-contradictory. The first step towards philosophy consists in becoming aware of these defects, not in order to rest content with a lazy scepticism, but in order to substitute an amended kind of knowledge which shall be tentative, precise and self-consistent.