John F. Kennedy

A man does what he must - in spite of personal consequences, in spite of obstacles and dangers and pressures - and that is the basis of all human morality.

Mothers all want their sons to grow up to be president, but they don't want them to become politicians in the process.

Our growing softness, our increasing lack of physical fitness, is a menace to our security.

Well, I actually wrote her a letter a couple of days ago congratulating her. The tone I tried to convey in the letter is, look, you are a part of a great American historical process.

I was a very conscientious student.

Biodiversity starts in the distant past and it points toward the future.