Book excerpt: A collection of essays extended from The New York Times' most-read article of 2016. Anyone we might marry could, of course, be a little bit wrong for us. We don’t expect bliss every day. The fault isn’t entirely our own; it has to do with the devilish truth that anyone we’re liable to meet is going to be rather wrong, in some fascinating way or another, because this is simply what all humans happen to be – including, sadly, ourselves. This collection of essays proposes that we don’t need perfection to be happy. So long as we enter our relationships in the right spirit, we have every chance of coping well enough with, and even delighting in, the inevitable and distinctive wrongness that lies in ourselves and our beloveds.