No amount of experimentation can ever prove me right; a single experiment can prove me wrong.

Immorality: the morality of those who are having a better time.

There are no shortcuts in evolution.

Hope is the only bee that makes honey without flowers.

Principles have no real force except when one is well-fed.

A friend is one who knows you and loves you just the same.

Remember that the most valuable antiques are dear old friends.

Be not simply good - be good for something.

My fellow Americans, ask not what your country can do for you, ask what you can do for your country.