...nature seems very conversant with the rules of pure mathematics, as our own mathematicians have formulated them in their studies, out of their own inner consciousness and without drawing to any appreciable extent on their experience of the outer world.

The essential fact is that all the pictures which science now draws of nature, and which alone seem capable of according with observational facts, are mathematical pictures.

Humanity is at the very beginning of its existence-a new-born babe, with all the unexplored potentialities of babyhood; and until the last few moments its interest has been centred, absolutely and exclusively, on its cradle and feeding bottle.

To travel hopefully is better than to arrive.

All discussion of the ultimate nature of things must necessarily be barren unless we have some extraneous standards against which to compare them.

The motion of the stars over our heads is as much an illusion as that of the cows, trees and churches that flash past the windows of our train.

Science should leave off making pronouncements: the river of knowledge has too often turned back on itself.