Stoicism is a school of `Hellenistic philosophy`_ that `Zeno of Citium`_ founded in Athens in the early 3rd century BC. Stoics taught that destructive emotions resulted from errors in judgment, and that a sage, or person of "moral and intellectual perfection", would not suffer such emotions.

A person gives up their power when they put their emotions in the control of others.

A girl wants a confident man who can brush off rejection with a laugh. Don't look embarrassed or upset. Joke about it, say, "I see how it is,"

1   Further reading

Do not Pray for Easy Lives. Pray to be Stronger Men.

—Reverend Phillips Brooks, later recycled by John F. Kennedy in 1963

In response to the criticism that Stoics, by accepting the things they can't change, might not ever change anything:

Arguably, the core of Stoicism is you can't peg your success or self-worth to external factors. Doing so is a "recipe" for failure. Goals should be centered around things which are within your control, where control is a matter of degree and not binary absolutes.

Letting go of things you can't change isn't about acceptance as much as not spending energy on rumination in place of mitigation.

“If you accomplish something good with hard work, the labor passes quickly, but the good endures; if you do something shameful in pursuit of pleasure, the pleasure passes quickly, but the shame endures.” — Gaius Musonius Rufus, Fragment 51

The Stoics explained the relationship between fate and free will in the following way. A dog on a leash will be moved from point A to point B. This is fate. He may choose to walk happily and comfortably from A to B, not even noticing the leash; this is free will. Or the dog may resist and struggle, but he will then be dragged from A to B. By resisting fate, man causes his own suffering and pain.

Memento mori