Nothing that goes on in anyone else's mind can harm you.

Once you have done a man a service, what more reward would you have? Is it not enough to have obeyed the laws of your own nature, without expecting to be paid for it?

Stick to what's in front of you - idea, action, utterance.

In man's life, time is but a moment; being, a flux; sense is dim; the material frame corruptible; soul, an eddy of breath; fortune a thing inscrutable, and fame precarious.

When you need encouragement, think of the qualities the people around you have: this one's energy, that one's modesty, another's generosity, and so on. Nothing is as encouraging as when virtues are visibly embodied in the people around us, when we're practically showered with them. It's good to keep this in mind.

If any man should conceive certain things as being really good, such as prudence, temperance, justice, fortitude, he would not after having first conceived these endure to listen to anything which should not be in harmony with what is really good.

Do not waste what remains of your life in speculating about your neighbors, unless with a view to some mutual benefit. To wonder what so-and-so is doing and why, or what he is saying, or thinking, or scheming -- in a word, anything that distracts you from fidelity to the ruler within you -- means a loss of opportunity for some other task.