One ought to be ashamed to make use of the wonders of science embodied in a radio set, the while appreciating them as little as a cow appreciates the botanic marvels in the plants she munches.

On the other hand, the concept owes its meaning and its justification exclusively to the totality of the sense impressions which we associate with it.

A human being is a part of the whole called by us universe; a part limited in time and space. He experiences himself, his thoughts, and his feelings as something separate from the rest - a kind of optical delusion of consciousness.

We have penetrated far less deeply into the regularities obtaining within the realm of living things, but deeply enough nevertheless to sense at least the rule of fixed necessity... what is still lacking here is a grasp of the connections of profound generality, but not a knowledge of order itself.

Before God we are all equally wise - and equally foolish.

Make everything as simple as possible, but not simpler.

Life is a Mystery, not a problem waiting to be solved.