Take charge of your thoughts. You can do what you will with them

He who is gracious to his lover under the impression that he is rich, and is disappointed of his gains because he turns out to be poor, is disgraced all the same: for he has done his best to show that he would give himself up to any one's "uses base" for the sake of money; but this is not honourable.

In order to seek one's own direction, one must simplify the mechanics of ordinary, everyday life.

Where reverence is, there is fear; for he who has a feeling of reverence and shame about the commission of any action, fears and is afraid of an ill reputation.

May I do to others as I would that they should do unto me.

The greatest penalty of evil-doing is to grow into the likeness of bad men, and, growing like them, to fly from the conversation of the good, and be cut off from them, and cleave to and follow after the company of the bad.

Mathematics is like draughts in being suitable for the young, not too difficult, amusing, and without peril to the state.