To do great things is difficult, but to command great things is more difficult.

A house divided against itself cannot stand.

Nobody made a greater mistake than he who did nothing because he could do only a little.

The only way to get the best of an argument is to avoid it.

What's done can't be undone.

There's no sense in being precise when you don't even know what you're talking about.

Only idiots refuse to change their minds.

In the practice of tolerance, one's enemy is the best teacher.

I hear and I forget. I see and I remember. I do and I understand.

Those who know, do. Those that understand, teach.

Let no man pull you low enough to hate him.

Beauty is not in the face; beauty is a light in the heart.

Take care of the pieces well. The whole will take care of itself.

You can be rich in spirit, kindness, love and all those things that you can't put a dollar sign on.

It’s your road and yours alone. Others may walk it with you, but no one can walk it for you.

We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.

What a man does for others, not what they do for him, gives him immortality.

The only real mistake is the one from which we learn nothing.

Rational discussion is useful only when there is a significant base of shared assumptions.

It is not enough to have a good mind; the main thing is to use it well.

The only real laughter comes from despair.