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Leadership and learning are indispensable to each other.

Let both sides seek to invoke the wonders of science instead of its terrors. Together let us explore the stars, conquer the deserts, eradicate disease, tap the ocean depths, and encourage the arts and commerce.

Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and the success of liberty.

Let the word go forth from this time and place, to friend and foe alike, that the torch has been passed to a new generation of Americans - born in this century, tempered by war, disciplined by a hard and bitter peace.

Let us never negotiate out of fear. But let us never fear to negotiate.

Let us not seek the Republican answer or the Democratic answer, but the right answer. Let us not seek to fix the blame for the past. Let us accept our own responsibility for the future.

Man is still the most extraordinary computer of all.

Mankind must put an end to war before war puts an end to mankind.

My brother Bob doesn't want to be in government - he promised Dad he'd go straight.

My fellow Americans, ask not what your country can do for you, ask what you can do for your country.