It is better to starve to death in a calm and confident state of mind than to live anxiously amidst abundance. - Epictetus

Freedom is the only worthy goal in life. It is won by disregarding things that lie beyond our control.

On the occasion of every accident (event) that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. If you see a fair man or a fair woman, you will find that the power to resist is temperance (continence). If labor (pain) be presented to you, you will find that it is endurance. If it be abusive words, you will find it to be patience. And if you have been thus formed to the (proper) habit, the appearances will not carry you along with them.

But prove to me that one who holds inferior judgments can prevail over a man who is superior in his judgments. You never will prove it, nor anything like it; for the law of nature and of god is this: Let the better always be superior to the worse… Thus I, too, lost my lamp to a thief because the thief was better at keeping awake than I. But he bought a lamp at the price of being a thief, a rogue, and a brute. That seemed to him a good bargain.
Epictetus