All of us are experts at practicing virtue at a distance.

The very essence of leadership is that you have to have vision. You can't blow an uncertain trumpet.

The greatest fallout of the space program, ... was not the close-up view of the moon, but a look at spaceship Earth from afar. For the first time in the history of humanity, we were able to see our planet for what it really is.

My basic principle is that you don't make decisions because they are cheap; you make them because they're right.

It is easier to exemplify values than teach them.

A decade after an average athlete graduates, everyone will have forgotten when and where he played. But every time he speaks, everyone will know whether he was educated.

You can't blow an uncertain trumpet.