The two versions of him were related the way a body and its shadow were. Connected, yes. Each inextricably related to the other, yes. But not the same thing.
The great thing about dead or remote masters is that they can’t refuse you as an apprentice. You can learn whatever you want from them. They left their lesson plans in their work.
“If you ask yourself ‘What’s the best thing that happened today?’ it actually forces a certain kind of cheerful retrospection that pulls up from the recent past things to write about that you wouldn’t otherwise think about. If you ask yourself ‘What happened today?’ it’s very likely that you’re going to remember the worst thing, because you’ve had to deal with it—you’ve had to rush somewhere or somebody said something mean to you—that’s what you’re going to remember. But if you ask what the best thing is, it’s going to be some particular slant of light, or some wonderful expression somebody had, or some particularly delicious salad.” —Nicholson Baker
The rest of their mutual ennui, he supposes, is simply cumulative. He had read that the Puritans used to execute heretics by placing stones on their chests until their rib cages were crushed or they suffocated. And that’s a little what he feels like—and he supposes that Marisol does as well—the sheer cumulative weight of death after death, sorrow after sorrow, crushing them, taking the air out of their lives.