It's a faraway memory, nearly lost in the tide of zeroes and ones that shape our new digital world. Sometimes, though, I do remember the calming effect of a safe light: the soft red glow that spilled through the darkrooms of my adolescence. Years ago (decades now, I'm amazed to say), I pursued photography as a serious study. I didn't go far with it, never approached anything near a professional level, but I took it a tad farther than just a hobby. For a time. I was still in high school, and the darkroom was a comfortable place to be—hidden from sight, engaged in the act of creating something, seeing images develop from nothing. I remember the smell of chemicals, the eddy of the water bath, but most of all the light in darkness. Red is usually a stimulant—to passion, to action, to anger—and it's associated with all kinds of vice. In the darkroom, though, it was none of those things. I did not meditate when I was a teen. I had no informed opinion of meditation. Still, wha...