"Every observation we make is a step closer to understanding the cosmos."

Incomplete perfection is more profound than complete perfection.

清晰的使命为每一个行动提供方向和目的。

If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

The only thing we can know is that we know nothing and that is the highest flight of human wisdom.