The time to repair the roof is when the sun is shining.

Now we have a problem in making our power credible, and Vietnam is the place.

Moral courage is more a rare commodity than bravery in a battle or great intelligence.

If anyone is crazy enough to want to kill a president of the United States, he can do it. All he must be prepared to do is give his life for the president's.

We choose to go to the moon in this decade and do the other things. Not because they are easy, but because they are hard.

We go into space because whatever mankind must undertake, free men must fully share.

Show me a man with a great golf game, and I’ll show you a man who has been neglecting something.