" It is a world that is made of love. Did you think there is only the kind of love your sister knows for her husband? Did you think there must be here, a man with whiskers, and over here, a lady in a gown? Haven't I said, there are no whiskers and gowns where spirits are? And what will your sister do if her husband should die, and she should take another? Who will she fly to then, when she has crossed the spheres? For she will fly to someone, we will all fly to someone, we will all return to that piece of shining matter from which our souls were torn with another, two halves of the same. It may be that the husband your sister has now has that other soul, that has the affinity with her soul—I hope it is. But it may be the next man she takes, or it may be neither. It may be someone she would never think to look to on the earth, someone kept from her by some false boundary... "

― Sarah Waters , Affinity