Victory has a thousand fathers, but defeat is an orphan.

Change is the law of life. And those who look only to the past or present are certain to miss the future.

As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them.

Things do not happen. Things are made to happen.

There are risks and costs to action. But they are far less than the long range risks of comfortable inaction.

Efforts and courage are not enough without purpose and direction.

Those who make peaceful revolution impossible will make violent revolution inevitable.

Forgive your enemies, but never forget their names.

Leadership and learning are indispensable to each other.

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.

Israel was not created in order to disappear - Israel will endure and flourish. It is the child of hope and the home of the brave. It can neither be broken by adversity nor demoralized by success. It carries the shield of democracy and it honors the sword of freedom.

Those who dare to fail miserably can achieve greatly.

The ignorance of one voter in a democracy impairs the security of all.

Conformity is the jailer of freedom and the enemy of growth.

Physical fitness is not only one of the most important keys to a healthy body, it is the basis of dynamic and creative intellectual activity.

Our problems are man-made, therefore they may be solved by man. And man can be as big as he wants. No problem of human destiny is beyond human beings.

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.

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

Too often we... enjoy the comfort of opinion without the discomfort of thought.

The time to repair the roof is when the sun is shining.

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

A man may die, nations may rise and fall, but an idea lives on.

The cost of freedom is always high, but Americans have always paid it. And one path we shall never choose, and that is the path of surrender, or submission.

When power leads man toward arrogance, poetry reminds him of his limitations. When power narrows the area of man's concern, poetry reminds him of the richness and diversity of existence. When power corrupts, poetry cleanses.

We are tied to the ocean. And when we go back to the sea, whether it is to sail or to watch - we are going back from whence we came.

Geography has made us neighbors. History has made us friends. Economics has made us partners, and necessity has made us allies. Those whom God has so joined together, let no man put asunder.

Washington is a city of Southern efficiency and Northern charm.

The greater our knowledge increases the more our ignorance unfolds.

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

The great enemy of the truth is very often not the lie, deliberate, contrived and dishonest, but the myth, persistent, persuasive and unrealistic.

We are not here to curse the darkness, but to light the candle that can guide us thru that darkness to a safe and sane future.

If art is to nourish the roots of our culture, society must set the artist free to follow his vision wherever it takes him.

Man is still the most extraordinary computer of all.

Domestic policy can only defeat us; foreign policy can kill us.

When written in Chinese, the word 'crisis' is composed of two characters. One represents danger and the other represents opportunity.

The goal of education is the advancement of knowledge and the dissemination of truth.

Our most basic common link is that we all inhabit this planet. We all breathe the same air. We all cherish our children's future. And we are all mortal.

A man does what he must - in spite of personal consequences, in spite of obstacles and dangers and pressures - and that is the basis of all human morality.

History is a relentless master. It has no present, only the past rushing into the future. To try to hold fast is to be swept aside.

Communism has never come to power in a country that was not disrupted by war or corruption, or both.

Once you say you're going to settle for second, that's what happens to you in life.

Peace is a daily, a weekly, a monthly process, gradually changing opinions, slowly eroding old barriers, quietly building new structures.

I am the man who accompanied Jacqueline Kennedy to Paris, and I have enjoyed it.

For time and the world do not stand still. Change is the law of life. And those who look only to the past or the present are certain to miss the future.

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.

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

There is always inequality in life. Some men are killed in a war and some men are wounded and some men never leave the country. Life is unfair.

The world is very different now. For man holds in his mortal hands the power to abolish all forms of human poverty, and all forms of human life.

The sun doesn't always shine in West Virginia, but the people do.

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 futures. And we are all mortal.

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

If a free society cannot help the many who are poor, it cannot save the few who are rich.

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

If anyone is crazy enough to want to kill a president of the United States, he can do it. All he must be prepared to do is give his life for the president's.

Mothers all want their sons to grow up to be president, but they don't want them to become politicians in the process.

War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today.

We stand today on the edge of a new frontier - the frontier of the 1960's - a frontier of unknown opportunities and perils - a frontier of unfulfilled hopes and threats.

The human mind is our fundamental resource.

Our progress as a nation can be no swifter than our progress in education. The human mind is our fundamental resource.

We would like to live as we once lived, but history will not permit it.