I am the wisest man alive, for I know one thing, and that is that I know nothing.

I know that I am intelligent, because I know that I know nothing.

One thing I don't believe I am at all is bitter.

One thing I can tell you is this, that I am not a methodical writer.

I am dominated by one thing, an irresistible, burning attraction towards the abstract.

I am concerned with only one thing, the moral and social conditions of my generation.