Boys and girls should be taught respect for each other's liberty... and that jealousy and possessiveness kill love.

The social psychologist of the future will have a number of classes of school children on whom they will try different methods of producing an unshakable conviction that snow is black. When the technique has been perfected, every government that has been in charge of education for more than one generation will be able to control its subjects securely without the need of armies or policemen.

Science does not aim at establishing immutable truths and eternal dogmas; its aim is to approach the truth by successive approximations, without claiming that at any stage final and complete accuracy has been achieved.

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

There is no logical impossibility in the hypothesis that the world sprang into being five minutes ago, exactly as it then was, with a population that "remembered" a wholly unreal past. There is no logically necessary connection between events at different times; therefore nothing that is happening now or will happen in the future can disprove the hypothesis that the world began five minutes ago.

To a modern mind, it is difficult to feel enthusiastic about a virtuous life if nothing is going to be achieved by it.

I am as drunk as a lord, but then, I am one, so what does it matter ?