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.

Take care that you entertain no notions unsuitable to virtue and reasonable nature.

From Apollonius I learned freedom of will and undeviating steadiness of purpose; and to look to nothing else, not even for a moment, except to reason; and to be always the same, in sharp pains, on the occasion of the loss of a child, and in long illness.

Practice really hearing what people say. Do your best to get inside their mind.

I am an old man and have had many worries, but most have never come to pass.

Remember that all is opinion. For what was said by the Cynic Monimus is manifest: and manifest too is the use of what was said, if a man receives what may be got out of it as far as it is true.

The whole contains nothing that is not for its advantage. By remembering that I am part of such a whole, I shall be content with everything that happens.