There is no such thing on earth as an uninteresting subject; the only thing that can exist is an uninterested person.

If it's worth doing, it's worth doing badly. (on not perfectionism to put things off) .

The men of the clique live together because they have the same kind of soul, and their narrowness is a narrowness of spiritual coherence and contentment, like that which exists in hell . . .

In dealing with the arrogant asserter of doubt, it is not the right method to tell him to stop doubting. It is rather the right method to tell him to go on doubting, to doubt a little more, to doubt every day newer and wilder things in the universe, until at last, by some strange enlightenment, he may begin to doubt himself.

It is really not so repulsive to see the poor asking for money as to see the rich asking for more money. And advertisement is the rich asking for more money.

Without education we are in a horrible and deadly danger of taking educated people seriously.

In the struggle for existence, it is only on those who hang on for ten minutes after all is hopeless, that hope begins to dawn.