You have power over your mind — not outside events. Realize this, and you will find strength.

This line is usually credited to Marcus Aurelius, but it is a modern paraphrase rather than a translation of anything in Meditations. The closest passage is 12.22: everything is opinion, and opinion is in your power. Still, it captures the essence of Stoicism: our suffering comes not from the world itself, but from our interpretations of it. We can’t control outcomes, other people, or chance — but we can control our thoughts, choices, and judgments.

To “realize this” is to claim inner sovereignty. It’s not about ignoring pain or pretending life is easy, but about recognizing where your true agency lies. When you stop trying to control the uncontrollable, your energy returns to where it can make a difference — your mindset, your actions, your integrity. That recognition is the foundation of resilience and strength.