I watched a man miss his subway stop this morning. He was so absorbed in his phone that when he finally looked up, the doors had already closed. His face showed not just frustration, but something deeper—a flash of recognition that he'd lost ten minutes he could never reclaim.
We spend our lives making trades we barely notice. Every time we scroll, we're choosing that content over the conversation we could be having, the book we might read, the thought we could follow to its end. Every "yes" contains within it a thousand silent "no's" to things we'll never even know we missed.
The ancient Stoics talked about prohairesis—the faculty of choice, our capacity to decide what deserves our attention. They considered it the only thing truly under our control. Everything else—success, health, reputation—was subject to fortune's whims. But where we direct our mind? That remains ours.