Choose rather to be strong of soul than strong of body.

Respect yourself if you would have others respect you.

Criticize the act, not the person.

One who loses wealth loses much. One who loses a friend loses more. But one who loses courage loses all.

Yesterday is but today's memory and tomorrow is today's dream.

When you judge another, you do not define them, you define yourself.

At the center of your being you have the answer; you know who you are and you know what you want.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

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

Be curious, not judgmental.

Creativity is the process of having original ideas that have value.

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

A mistake is always forgivable, rarely excusable and always unacceptable.

Do not pray for an easy life, pray for the strength to endure a difficult one.

Wisdom is not the product of schooling, but of the lifelong attempt to acquire it.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

Muddy water is best cleared by leaving it alone.

Let no man pull you low enough to hate him.

The most courageous act is still to think for yourself. Aloud.

Having a great intellect is no path to being happy.