If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut

I believe that pipe smoking contributes to a somewhat calm and objective judgement in all human affairs.

You can't resolve a dilemma with all the very same mind that made it

The real difficulty, the difficulty which has baffled the sages of all times, is rather this: how can we make our teaching so potent in the motional life of man, that its influence should withstand the pressure of the elemental psychic forces in the individual?

A knowledge of the existence of something we cannot penetrate, of the manifestations of the profoundest reason and the most radiant beauty - it is this knowledge and this emotion that constitute the truly religious attitude; in this sense, and in this alone, I am a deeply religious man.

But the creative principle resides in mathematics. In a certain sense, therefore, I hold true that pure thought can grasp reality, as the ancients dreamed.

If God has created the world, his primary worry was certainly not to make its understanding easy for us