Book 8, section 1

Another encouragement to humility: you can't claim to have lived your life as a philosopher —not even your whole adulthood. You can see for yourself how far you are from philosophy. You're tainted. It's not so easy now —to have a reputation as a philosopher. And your position is an obstacle as well.

So you know how things stand. Now forget what they think of you. Be satisfied if you can live the rest of your life, however short, as your nature demands. Focus on that, and don’t let anything distract you. You’ve wandered all over and finally realized that you never found what you were after: how to live. Not in syllogisms, not in money, or fame, or self-indulgence. Nowhere.

—Then where is it to be found?

In doing what human nature requires.

—How?

Through first principles, which should cover your intentions and your actions.

—What principles?

Those to do with good and evil. That nothing is good except what leads to fairness, and self-control, and courage, and free will. And nothing bad except what does the opposite.