If we cannot end now our differences, at least we can help make the world safe for diversity.

[Commencement Address at American University, June 10 1963]

If we cannot end now our differences, at least we can help make the world safe for diversity. For, in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's future. And we are all mortal.

[Commencement Address at American University, June 10 1963]

It is an unfortunate fact that we can secure peace only by preparing for war.

Mankind must put an end to war - or war will put an end to mankind.

[Address before the United Nations, September 25 1961]

Tolerance implies no lack of commitment to one's own beliefs. Rather it condemns the oppression or persecution of others.

To those peoples in the huts and villages of half the globe struggling to break the bonds of mass misery, we pledge our best efforts to help them help themselves, for whatever period is required - not because the Communists may be doing it, not because we seek their votes, but because it is right. If a free society cannot help the many who are poor, it cannot save the few who are rich.