Nichomachean Ethics

With regard to excellence, it is not enough to know, but we must try to have and use it.

We make war that we may live in peace.

Piety requires us to honor truth above our friends.

It is possible to fail in many ways...while to succeed is possible only in one way.

To be conscious that we are perceiving or thinking is to be conscious of our own existence.

One swallow does not make a summer.

We must as second best...take the least of the evils.

To enjoy the things we ought and to hate the things we ought has the greatest bearing on excellence of character.

For the things we have to learn before we can do them, we learn by doing them.

Without friends no one would choose to live, though he had all other goods.