The tragedy of modern man is not that he knows less and less about the meaning of his own life, but that it bothers him less and less.

There appear to be no integrating forces, no unified meaning, no true inner understanding of phenomena in our experience of the world. Experts can explain anything in the objective world to us, yet we understand our own lives less and less. In short, we live in the postmodern world, where everything is possible and almost nothing is certain.

What's certain is that a totalitarian enclave like Cuba's can't continue to exist, so change will definitely come there, eventually.

Hope is definitely not the same thing as optimism. It is not the conviction that something will turn out well, but the certainty that something makes sense, regardless of how it turns out.

The real test of a man is not when he plays the role that he wants for himself but when he plays the role destiny has for him.

The truth is not simply what you think it is; it is also the circumstances in which it is said, and to whom, why, and how it is said.

It is not enough to invent new machines, new regulations, or new institutions. We must understand differently and more perfectly the true purpose of our existence on this earth.