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

Inventive genius requires pleasurable mental activity as a condition for its vigorous exercise

Speech is human nature itself, with none of the artificiality of written language.

It is not paradox to say that in our most theoretical moods we may be nearest to our most practical applications.

In order to acquire learning, we must first shake ourselves free of it.

A clash of doctrine is not a disaster, it is an opportunity.

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.