Evil (ignorance) is like a shadow. It has no real substance of its own, it is simply a lack of light. You cannot cause a shadow to disappear by trying to fight it, stamp on it, by railing against it, or any other form of emotional or physical resistance. In order to cause a shadow to disappear, you must shine light on it.

The real problem is in the hearts and minds of men. It is easier to denature plutonium than to denature the evil spirit of man.

When you choose the lesser of two evils, always remember that it is still an evil.

No man is justified in doing evil on the ground of expedience.

Science may have found a cure for most evils; but it has found no remedy for the worst of them all -- the apathy of human beings.

The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.

The function of wisdom is to discriminate between good and evil.

An insincere and evil friend is more to be feared than a wild beast; a wild beast may wound your body, but an evil friend will wound your mind.