All human activity is prompted by desire.

When I first met you, I thought we were made for each other even though we seemed like opposites in some ways and we fought. But now...What?Now I feel like we weren't made for each other. We're making each other— into the people we should become. Do you know what I mean?

Yes, I am finally a match for Amy. The other morning I woke up next to her, and I studied the back of her skull. I tried to read her thoughts. For once I didn't feel like I was staring into the sun. I'm rising to my wife's level of madness. Because I can feel her changing me again: I was a callow boy, and then a man, good and bad. Now at last I'm the hero. I am the one to root for in the never-ending war story of our marriage. It's a story I can live with. Hell, at this point, I can't imagine my story without Amy. She is my forever antagonist.We are one long frightening climax.

We don't need to have just one favorite. We keep adding favorites. Our favorite book is always the book that speaks most directly to us at a particular stage in our lives. And our lives change. We have other favorites that give us what we most need at that particular time. But we never lose the old favorites. They're always with us. We just sort of accumulate them.