Not everything that can be counted counts, and not everything that counts can be counted.

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

If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.

It is divinity that shapes, not only your ends, but also your acts, your words and thoughts.

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

The secret of life, though, is to fall seven times and to get up eight times.

Moderation in temper is always a virtue; but moderation in principle is always a vice.

None but ourselves can free our minds.

Experience keeps a dear school, but fools will learn in no other.

To avoid criticism say nothing, do nothing, be nothing.

All that we see or seem is but a dream within a dream.

Generosity is giving more than you can, and pride is taking less than you need.

Real knowledge is to know the extent of one's ignorance.

A precedent embalms a principle.

A perfection of means, and confusion of aims, seems to be our main problem.

If you do what you've always done, you'll get what you've always gotten.

You place too much importance... on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow to be!

Do your little bit of good where you are; it's those little bits of good put together that overwhelm the world.

Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

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