Culture of the mind must be subservient to the heart.
Mohandas Gandhi

If someone thinks that love and peace is a cliche that must have been left behind in the Sixties, that's his problem. Love and peace are eternal.
John Lennon

Mankind must put an end to war before war puts an end to mankind.
John F. Kennedy

We must use time as a tool, not as a couch.
John F. Kennedy

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

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

In a very real sense, it will not be one man going to the moon it will be an entire nation. For all of us must work to put him there.
John F. Kennedy

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.
John F. Kennedy

It is of practical value to learn to like yourself. Since you must spend so much time with yourself you might as well get some satisfaction out of the relationship.
Norman Vincent Peale

To announce that there must be no criticism of the president... is morally treasonable to the American public.
Theodore Roosevelt

The boy who is going to make a great man must not make up his mind merely to overcome a thousand obstacles, but to win in spite of a thousand repulses and defeats.
Theodore Roosevelt

Rhetoric is a poor substitute for action, and we have trusted only to rhetoric. If we are really to be a great nation, we must not merely talk; we must act big.
Theodore Roosevelt

Germany has reduced savagery to a science, and this great war for the victorious peace of justice must go on until the German cancer is cut clean out of the world body.
Theodore Roosevelt

It is essential that there should be organization of labor. This is an era of organization. Capital organizes and therefore labor must organize.
Theodore Roosevelt

To say "I love you" one must first be able to say the "I."
Ayn Rand

When one has not had a good father, one must create one.
Friedrich Nietzsche

A friend should be a master at guessing and keeping still: you must not want to see everything.
Friedrich Nietzsche

After coming into contact with a religious man I always feel I must wash my hands.
Friedrich Nietzsche

One must still have chaos in oneself to be able to give birth to a dancing star.
Friedrich Nietzsche

A woman may very well form a friendship with a man, but for this to endure, it must be assisted by a little physical antipathy.
Friedrich Nietzsche