We've all felt this—lying awake at 3 AM running through worst-case scenarios, feeling drained before anything bad has even happened. Anxiety is oddly efficient at stealing our energy in the present moment while leaving the future problem completely untouched. If something difficult is actually coming, we'll still have to face it. But we've already paid a price twice: once in the worry, and again when the real thing arrives.
The counterintuitive part is that this doesn't mean we should just stop worrying. Sometimes caution matters. The real insight is recognizing when you've crossed the line from useful planning into pure energy drain. There's a moment when another mental rehearsal stops being practical and starts being a tax on today's focus, mood, and ability to actually help anyone—including your future self. That person tomorrow who has to deal with the real problem? They'd probably want today's version to have slept well and stayed steady, not spent everything anxiously.
The choice isn't between worry and carelessness. It's between directing your energy toward what you can actually control right now, or letting anxiety burn through your strength on a problem that exists only in your head. One prepares you. The other just leaves you tired.