The great enemy of truth is very often not the lie--deliberate, contrived and dishonest--but the myth--persistent, persuasive and unrealistic. Too often we hold fast to the cliches of our forebears. We subject all facts to a prefabricated set of interpretations. We enjoy the comfort of opinion without the discomfort of thought.

Any system of government will work when everything is going well. It's the system that functions in the pinches that survive

All of us do not have equal talent, but all of us should have an equal opportunity to develop our talent.

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

There is nothing more certain and unchanging than uncertainty and change.

No man who enters upon the office to which I have succeeded can fail to recognize how every president of the United States has placed special reliance upon his faith in God.

Never let your fears hold you back from pursuing your hopes.