Epictetus

Men are disturbed not by things, but by their opinions about them.

Every habit and faculty is preserved and increased by the corresponding actions.

Nothing great is produced suddenly, since not even the grape or the fig is.

Some things are within our control and some things are not. Within our control are opinion, motivation, desire, aversion, and our actions. Not within our control are our body, property, reputation, and office.

If you wish to improve, be content to appear foolish and stupid regarding externals.

He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.

It is not things themselves that trouble us, but our judgements about those things.

Never call yourself a philosopher, nor talk a great deal among the unlearned about theorems, but act conformably to them.

Remember that it is not he who gives abuse or blows who affronts, but the view we take of these things as insulting.

Everything has two handles, the one by which it may be carried, the other by which it cannot.

It is the act of an ill-instructed man to blame others for his own bad condition; it is the act of one who has begun to be instructed, to lay the blame on himself; and of one whose instruction is completed, neither to blame another, nor himself.

Only the educated are free.

When you do anything from a clear judgment that it ought to be done, never shun the being seen to do it, even though the world should make a wrong supposition about it.

First say to yourself what you would be; and then do what you have to do.

Make the best use of what is in your power, and take the rest as it happens.

Seek not that the things which happen should happen as you wish; but wish the things which happen to be as they are.

It is impossible for a man to learn what he thinks he already knows.