Reflections on Turning 30, 40, and—oh, God—50.

I remember when I was little and I looked at someone who was nearing 50 and thought—Jeez, you’re old. You will be dead soon. You are half a century. Ten years ago when I was about to turn 40 I had a meltdown–of epic proportions. Things weren’t going too well for me at that time,…