I did not fail two thousand times. I merely found two thousand ways not to make a lightbulb.

Baseball is the greatest of American games. Some say football, but it is my firm belief, and it shall always be, that baseball has no superior.

Discontent is the first necessity of progress.

An average American loves his family. If he has any love left over for some other person, he generally selects Mark Twain.

To me, the idea and expectation that the day is slowly and surely coming when we will be able to honestly say we are our brother's keeper and not his oppressor is very beautiful .

The United States, and other advanced nations, will someday be able to produce instruments of death so terrible the world will be in abject terror of itself and its ability to end civilization.... Such war-making weapons should be developed - but only for purposes of discovery and experimentation

Never be discouraged, because every wrong turn attempt, when left behind you, is another step forward taking you closer to your goals.