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

I don't know if you ever really feel like you've made it.

Let us permit nature to have her way. She understands her business better than we do.

You wouldn't believe the kind of hate mail I get about my work on irregular verbs.

I am fond of pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.