Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
Results! Why man I have gotten a lot of results. I know several thousand...
Big shots are only little shots who keep shooting.
Perhaps the best motivation for going to Mars is political. It is obvious that no single nation currently has either the will or the resources to do it alone but a consortium of nations and space agencies could achieve it within 20 years.
