On these steps, playing Where’s Chris on the poster, the same steps he shuffled down for the first time thirty-seven years ago, you think about how a comedian, an actor, a writer—any serious artist, which is what he is—must resist the temptation to marvel too long at what they’ve made, must instead meet the constant challenge of equaling if not surpassing it. Must answer again and again the crucial questions echoing evermore in the mind: Does what I make matter? And, by extension, do I? Will I be remembered the next century? Here’s a little secret: Part of Rock’s productivity has been keeping a journal handy for more than thirty-five years. “You read it over, and you’re like,