It seems to be the fate of idealists to obtain what they have struggled for in a form which destroys their ideals.

There is exactly the same degree of possibility and likelihood of the existence of the Christian God as there is of the existence of the Homeric god. I cannot prove that either the Christian god or the Homeric gods do not exist, but I do not think that their existence is an alternative that is sufficiently probable to be worth serious consideration.

It is undesirable to believe a proposition when there is no ground whatever for supposing it true

Into every tidy scheme for arranging the pattern of human life, it is necessary to inject a certain dose of anarchism.

The search for something permanent is one of the deepest of the instincts leading men to philosophy.

Scientific method, although in its more refined forms it may seem complicated, is in essence remarkably simply. It consists in observing such facts as will enable the observer to discover general laws governing facts of the kind in question. The two stages, first of observation, and second of inference to a law, are both essential, and each is susceptible of almost indefinite refinement. (1931)

The fact that all Mathematics is Symbolic Logic is one of the greatest discoveries of our age; and when this fact has been established, the remainder of the principles of mathematics consists of the analysis of Symbolic Logic itself.