In order to have your voice be heard in Washington, you have to make some little contribution.

Some people don't like change, but you need to embrace change if the alternative is disaster.

When something is important enough, you do it even if the odds are not in your favor.

It's OK to have your eggs in one basket as long as you control what happens to that basket.

In order for us to have a future that's exciting and inspiring, it has to be one where we're a space-bearing civilization.

I think you should always bear in mind that entropy is not on your side.