The importance of an individual thinker owes something to chance. For it depends upon the fate of his ideas in the minds of his successors.

Aristotle discovered all the half-truths which were necessary to the creation of science.

Vigorous societies harbor a certain extravagance of objectives, so that men wander beyond the safe provision of personal gratifications.

If a dog jumps into your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.

Thus the negative perception is the triumph of consciousness.

An unflinching determination to take the whole evidence into account is the only method of preservation against the fluctuating extremes of fashionable opinion.

Art is the imposing of a pattern on experience, and our aesthetic enjoyment is recognition of the pattern.