Mathematics is the key to understanding the universe.

I have often been asked how my plays come about. I cannot say. Nor can I ever explain to myself what they mean.

The only thing that can stop me is me.

The best way to predict the future is to invent it.

The idea that a bell rings to signal when investors should get into or out of the market is simply not credible.

You have to be willing to take risks and make bold moves to succeed in business.