I consider Christian theology to be one of the great disasters of the human race.

The factor in human life provocative of a noble discontent is the gradual emergence of a sense of criticism, founded upon appreciation of beauty, and of intellectual distinction, and of duty.

Mathematics as a science, commenced when first someone, probably a Greek, proved propositions about "any" things or about "some" things, without specifications of definite particular things.

Vigorous societies harbour a certain extravagance of objectives.

Order is not sufficient. What is required, is something much more complex. It is order entering upon novelty; so that the massiveness of order does not degenerate into mere repetition; and so that the novelty is always reflected upon a background of system.

It is the business of future to be dangerous.... The major advances in civilization are processes that all but wreck the societies in which they occur.

Without adventure civilization is in full decay.