A peaceful world is a world in which differences are tolerated, and are not eliminated by violence.

There are plenty of problems in the world, many of them interconnected. But there is no problem which compares with this central, universal problem of saving the human race from extinction

Of all tasks of government the most basic is to protect its citizens against violence.

A capacity to change is indispensable. Equally indispensable is the capacity to hold fast to that which is good.

The mark of a successful organization isn't whether or not it has problems, its whether it has the same problems it had last year.

The world will never have lasting peace so long as men reserve for war the finest human qualities. Peace, no less than war, requires idealism and self-sacrifice and a righteous and dynamic faith.

The U.S. has no friends, only interests.