The energy you drew on so extravagantly when you were a kid, the energy you thought would never exhaust itself - that slipped away somewhere between eighteen and twenty-four, to be replaced by something much duller, something as bogus as a coke high: purpose, maybe, or goals, or whatever rah-rah Junior Chamber of Commerce word you wanted to use. It was no big deal; it didn't go all at once, with a bang. And maybe, Richie thought, that's the scary part. How you didn't stop being a kid all at once, with a big explosive bang, like one of that clown's trick balloons. The kid in you just leaked out, like the air of a tire.
Stephen King, It
childhood, growing-up, it