I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.
Leonardo da Vinci

To have great poets, there must be great audiences.
Walt Whitman

Life must be lived as play.
Plato

If particulars are to have meaning, there must be universals.
Plato

There must always remain something that is antagonistic to good.
Plato

Must not all things at the last be swallowed up in death?
Plato

For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.
Plato

If you wish to achieve worthwhile things in your personal and career life, you must become a worthwhile person in your own self-development.
Brian Tracy

For every moment of triumph, for every instance of beauty, many souls must be trampled.
Hunter S. Thompson

We must remember that a photograph can hold just as much as we put into it, and no one has ever approached the full possibilities of the medium.
Ansel Adams

Actually I don't remember being born, it must have happened during one of my black outs.
Jim Morrison

Every dog must have his day.
Jonathan Swift

A man must be big enough to admit his mistakes, smart enough to profit from them, and strong enough to correct them.
John C. Maxwell

Leaders must be close enough to relate to others, but far enough ahead to motivate them.
John C. Maxwell

If there must be trouble, let it be in my day, that my child may have peace.
Thomas Paine

Those who expect to reap the blessings of freedom must, like men, undergo the fatigue of supporting it.
Thomas Paine

He that would make his own liberty secure, must guard even his enemy from opposition; for if he violates this duty he establishes a precedent that will reach himself.
Thomas Paine

The abilities of man must fall short on one side or the other, like too scanty a blanket when you are abed. If you pull it upon your shoulders, your feet are left bare; if you thrust it down to your feet, your shoulders are uncovered.
Thomas Paine

How true Daddy's words were when he said: all children must look after their own upbringing. Parents can only give good advice or put them on the right paths, but the final forming of a person's character lies in their own hands.
Anne Frank

I must uphold my ideals, for perhaps the time will come when I shall be able to carry them out.
Anne Frank