On the ostensible exactitude of certain branches of human knowledge, including mathematics. The exactness is a fake.

The vigor of civilized societies is preserved by the widespread sense that high aims are worth-while.

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.

It belongs to the self-respect of intellect to pursue every tangle of thought to its final unravelment.

It is natural to think that an abstract science cannot be of much importance in affairs of human life, because it has omitted from its consideration everything of real interest.

Imagination is not to be divorced from the facts. It is a way of illuminating the facts.

Philosophy is the product of wonder.