After their encounter on the approach to Jupiter, there would aways be a secret bond between them---not of love, but of tenderness, which is often more enduring.

A faith that cannot survive collision with the truth is not worth many regrets.

Before you become too entranced with gorgeous gadgets and mesmerizing video displays, let me remind you that information is not knowledge, knowledge is not wisdom, and wisdom is not foresight. Each grows out of the other, and we need them all.

Whether we are based on carbon or on silicon makes no fundamental difference we should each be treated with appropriate respect.

Judge me by my deeds, though they are few, rather than my words, though they are many.

No utopia can ever give satisfaction to everyone, all the time. As their material conditions improve, men raise their sights and become discontented with power and possessions that once would have seemed beyond their wildest dreams. And even when the external world has granted all it can, there still remain the searchings of the mind and the longings of the heart.

The best measure of a man's honesty isn't his income tax return. It's the zero adjust on his bathroom scale.