One cannot learn so well as by experiencing it oneself.

I hate all the loathsome nonsense that goes with patriotism.

A ship is safe at shore but it's not built for that.

Without changing our pattern of thought, we will not be able to solve the problems we created with our current patterns of thought

A scientist is a mimosa when he himself has made a mistake, and a roaring lion when he discovers a mistake of others.

It is certainly true that principles cannot be more securely founded than on experience and consciously clear thinking.

It is very difficult to explain this feeling to anyone who is entirely without it, especially as there is no anthropomorphic conception of God corresponding to it. The individual feels the nothingness of human desires and aims and the sublimity and marvelous order which reveal themselves both in Nature and in the world of though. He looks upon individual existence as a sort of prison and wants to experience the universe as a single significant whole.