A true friend is the one who knowseverything about you and still loves you. Eventually, people will forget the things you said or did, but the feelingsyou woke up in them they will never forget!

The one sure means of dealing with boredom is to care for someone else to do something kind and good.

The end of science is not to prove a theory, but to improve mankind.

Moammar Gadhafi had more American blood on his hands than any individual other than Osama bin Laden.

A breakthrough in machine learning would be worth ten Microsofts.

The world is wonderful and beautiful and good beyond one's wildest imagination.

The brave man is not only he who overcomes the enemy, but he who is stronger than pleasures. Some men are masters of cities, but are enslaved to women.

Some of the most exciting space education in the country is not coming out of Washington or New York or California or even Texas. It's coming from a place in Kansas called the Cosmosphere.

While we are each free to believe whatever we choose, we cannot do whatever we choose.

What I've learned is that there is nothing in this life that does not fail to disappoint us, even our own deaths.

The adventure of life is to learn.