challenge Quotes

To become 'unique,' the challenge is to fight the hardest battle which anyone can imagine until you reach your destination.

If the United States commits to the goal of reaching Mars, it will almost certainly do so in reaction to the progress of other nations - as was the case with NASA, the Apollo program, and the project that became the International Space Station.

If you're going to lead a space frontier, it has to be government; it'll never be private enterprise. Because the space frontier is dangerous, and it's expensive, and it has unquantified risks. And under those conditions, you cannot establish a capital-market evaluation of that enterprise. You can't get investors.

The most creative people are motivated by the grandest of problems that are presented before them.

We didn't go to the moon to explore or because it was in our DNA or because we're Americans. We went because we were at war and we felt a threat.

To paint is the most terrific thing that there is, but to do it well is very difficult.

If your opponent is of choleric temper, irritate him.

I have frequently been questioned, especially by women, of how I could reconcile family life with a scientific career. Well, it has not been easy.

I believe we have to nip Ebola in the bud before it spreads through Africa and to other countries.

Unless you are breaking stuff, you are not moving fast enough.