As for earthquakes, though they were still formidable, they were so interesting that men of science could hardly regret them.

What the world needs is not dogma but an attitude of scientific inquiry.

I think the subject which will be of most importance politically is Mass Psychology... Its importance has been enormously increased by the growth of modern methods of propaganda. Although this science will be diligently studied, it will be rigidly confined to the governing class. The populace will not be allowed to know how its convictions are generated.

If one lived for ever the joys of life would inevitably in the end lose their savour. As it is, they remain perennially fresh.

The rules of logic are to mathematics what those of structure are to architecture.

The world that I should wish to see would be one freed from the virulence of group hostilities and capable of realizing that happiness for all is to be derived rather from co-operation than from strife. I should wish to see a world in which education aimed at mental freedom rather than imprisoning the minds of the young in rigid armor of dogma calculated to protect them through life against the shafts of impartial evidence.

That Plato's Republic should have been admired, on its political side, by decent people, is perhaps the most astonishing example of literary snobbery in all history.