We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power.

One is often told that it is a very wrong thing to attack religion, because religion makes men virtuous. So I am told; I have not noticed it.

Zeno was concerned with three problems... These are the problem of the infinitesimal, the infinite, and continuity.

Most political leaders acquire their position by causing large numbers of people to believe that these leaders are actuated by altruistic desires

In the higher walks of politics the same sort of thing occurs. The statesman who has gradually concentrated all power within himself ... may have had anything but a public motive... The phrases which are customary on the platform and in the Party Press have gradually come to him to seem to express truths, and he mistakes the rhetoric of partisanship for a genuine analysis of motives... He retires from the world after the world has retired from him.

He will see himself and life and the world as truly as our human limitations will permit; realizing the brevity and minuteness of human life, he will realize also that in individual minds is concentrated whatever of value the known universe contains.

A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy dare live.