Collective judgement of new ideas is so often wrong that it is arguable that progress depends on individuals being free to back their own judgement despite collective disapproval.

Learning is not compulsory. Neither is survival.

Art should be appreciated with passion and violence, not with a tepid, deprecating elegance that fears the censoriousness of a common room.

Compared with the totality of knowledge which is continually utilized in the evolution of a dynamic civilization, the difference between the knowledge that the wisest and that which the most ignorant individual can deliberately employ is comparatively insignificant.

This is the constitutional limitation of man's knowledge and interests, the fact that he cannot know more than a tiny part of the whole of society and that therefore all that can enter into his motives are the immediate effects which his actions will have in the sphere he knows.

From the saintly and single-minded idealist to the fanatic is often but a step.