A priori Logical propositions are such as can be known a priori without study of the actual world.

To be out of harmony with one's surroundings is of course a misfortune, but it is not always a misfortune to be avoided at all costs. Where the environment is stupid or prejudiced or cruel, it is a sign of merit to be out of harmony with it.

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. Of these the most influential is what is called 'education.' Religion plays a part, though a diminishing one; the press, the cinema, and the radio play an increasing part.... It may be hoped that in time anybody will be able to persuade anybody of anything if he can catch the patient young and is provided by the State with money and equipment.

The pure mathematician, like the musician, is a free creator of his world of ordered beauty.

What men really want is not knowledge but certainty.

Reason is a harmonising, controlling force rather than a creative one.

Love is a little haven of refuge from the world.