Unconditional war can…

Unconditional war can no longer lead to unconditional victory. It can no longer serve to settle disputes. It can no longer be of concern to great powers alone. For a nuclear disaster, spread by winds and waters and fear, could well engulf the great and the small, the rich and the poor, the committed and the uncommitted alike. Mankind must put an end to war or war will put an end to mankind.

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I really don’t know why it is that all of us are so committed to the sea, except I think it’s because in addition to the fact that the sea changes, and the light changes, and ships change, it’s because we all came from the sea. And it is an interesting biological fact that all of us have in our veins the exact same percentage of salt in our blood that exists in the ocean, and, therefore, we have salt in our blood, in our sweat, in our tears. We are tied to the ocean. And when we go back to the sea – whether it is to sail or to watch it – we are going back from whence we came. [Remarks at the Dinner for the America’s Cup Crews, September 14 1962] ~ John F. Kennedy 
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The rights of every man are diminished when the rights of one man are threatened. ~ John F. Kennedy 
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As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them. ~ John F. Kennedy 
Change is the law of life. And those who look only to the past or present are certain to miss the future. ~ John F. Kennedy 
We are not afraid to entrust the American people with unpleasant facts, foreign ideas, alien philosophies, and competitive values. For a nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people. ~ John F. Kennedy 
Without debate, without criticism, no administration and no country can succeed — and no republic can survive ~ John F. Kennedy 
If we cannot end now our differences, at least we can help make the world safe for diversity. ~ John F. Kennedy