Every parent has said it. Every coach has said it. "Just focus on what you can control." It sounds simple. It sounds obvious. But most teenagers — and most adults — don't actually know what that means in practice.
Marcus Aurelius, the Roman emperor who ruled one of the most powerful empires in history while simultaneously facing plagues, wars, and personal tragedy, wrote about this idea more than any other in his private journal, Meditations. He didn't write it as advice for others. He wrote it as a daily reminder to himself. That matters.
The Dichotomy of Control
The Stoic philosopher Epictetus — a former slave who became one of the most influential teachers in the ancient world — laid out the foundation of this idea in the very first line of his handbook, The Enchiridion:
"Some things are in our control and others not. Things in our control are opinion, pursuit, desire, aversion, and, in a word, whatever are our own actions. Things not in our control are body, reputation, command, and, in one word, whatever are not our own actions."
This is what philosophers call the Dichotomy of Control. And it is far more radical than the watered-down version most people repeat.
Notice what Epictetus puts in the "not in our control" column: body, reputation, and command. Your body — meaning illness, injury, how you look. Your reputation — meaning what other people think of you. Command — meaning outcomes, results, whether you win or lose.
For a teenager, this is confronting. It means the grade you receive is not fully in your control. Whether your friends like you is not fully in your control. Whether you make the team is not fully in your control. Only your effort, your attitude, your choices — these are yours.
Why This Isn't Passive or Defeatist
The most common misreading of Stoicism is that it encourages passivity. If outcomes aren't in your control, why try? But this gets it exactly backwards.
Marcus Aurelius was one of the most active, engaged rulers in Roman history. He didn't sit back and accept whatever happened. He worked tirelessly — on military campaigns, on legal reforms, on philosophical writing. The Stoic insight isn't "don't try." It's "try fully, and release the attachment to the outcome."
For a teenager preparing for an exam, this looks like: study as hard as you can, prepare as thoroughly as possible, then walk into the room knowing that the grade itself is not the measure of your worth. You controlled what you could. The rest is not yours to carry.
A Simple Practice for Tonight
Take a piece of paper and draw a line down the middle. On the left, write "In My Control." On the right, write "Not In My Control." Then take whatever is worrying your teen right now — a test, a friendship, a tryout — and sort every element of it into one of those two columns.
The goal isn't to ignore the right column. It's to stop spending energy there. Every hour spent worrying about what other people think is an hour not spent improving what you actually can.
Marcus Aurelius wrote to himself: "You have power over your mind, not outside events. Realize this, and you will find strength."
That's not a motivational poster. It's a daily practice. And it's one your teenager can start tonight.
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