God has entrusted me with myself. No man is free who is not master of himself. A man should so live that his happiness shall depend as little as possible on external things. The world turns aside to let any man pass who knows where he is going.

What is the first business of one who practices philosophy? To get rid of self-conceit. For it is impossible for anyone to begin to learn that which he thinks he already knows.

We ought to flee the friendship of the wicked, and the enmity of the good.

The wise realize that some things are within their control, and most things are not. They learn early on to distinguish between what they can and can't regulate.

If what charms you is nothing but abstract principles, sit down and turn them over quietly in your mind: but never dub yourself a Philosopher.

Getting distracted by trifles is the easiest thing in the world… Focus on your main duty

And be silent for the most part, or else make only the most necessary remarks, and express these in few words. But rarely, and when occasion requires you to talk, talk, indeed, but about no ordinary topics. Do not talk about gladiators, or horseraces, or athletes, or things to eat or drink - topics that arise on all occasions; but above all, do not talk about people, either blaming, or praising, or comparing them.