" You will not all find your doors again. Some doors really do appear only once, the consequence of some strange convergence that we can’t predict or re-create. They’re drawn by need and by sympathy. Not the emotion—the resonance of one thing to another. There’s a reason you were all pulled into worlds that suited you so well. Imagine, for a moment, if you’d fallen into the world described by your neighbor instead. "
― Seanan McGuire , Every Heart a Doorway (Wayward Children, #1)