Great dreamers' dreams are never fulfilled, they are always transcended.

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

The vitality of thought is in adventure. Idea's won't keep. Something must be done about them. When the idea is new, its custodians have fervour, live for it, and, if need be, die for it. Their inheritors receive the idea, perhaps now strong and successful, but without inheriting the fervour; so the idea settles down to a comfortable middle age, turns senile, and dies.

Learning preserves the errors of the past as well as its wisdom.

It is in literature that the concrete outlook of humanity receives its expression.

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.

It is the business of the future to be dangerous; and it is among the merits of science that it equips the future for its duties.