What I’ve achieved in tennis is great, but who I am as a person is more important.

The best economic research is often interdisciplinary.

I am the happiest creature in the world. Perhaps other people have said so before, but not one with such justice. I am happier even than Jane; she only smiles, I laugh.

The more the division of labor and the application of machinery extend, the more does competition extend among the workers, the more do their wages shrink together.

It's not about how you look, it's about how you see yourself.