I think I'd be depressed if everything were nearly all known, but I don't feel any danger of that happening.

You're entitled to say, if you're so smart, why don't you tell me what that dark matter is? And I'll have to confess I don't know.

It is an embarrassment that the dominant forms of matter in the universe remain hypothetical.

Happiness being surrounded by good friends and family at a BBQ.

If I'm dancing, or teaching, or having a family I would want to live life to the fullest as possible.

We humans have the capacity to wreak horrors on each other. But we also have the capacity to survive those horrors.

You have to stop worrying about looking foolish, 'cause fear of being humiliated really limits you.

It's nice not to have to worry about applying for things. It's really a different existence.

True greatness depends on total wisdom. The real lesson is to learn to love.

My father and I marched with Martin Luther King Jr. through the streets of Detroit.

Fate is unpenetrated causes.

Nobody ever wrote a good book simply by collecting a number of accurate facts and valid ideas.

National prosperity is another name for death and degradation to millions of other races.