This signature on each soul may be a product of heredity and environment, but that only means that (they) are among the instruments whereby God creates a soul. I am considering not how, but why, He makes each soul unique. If He had not use for all these differences, I do not see why He should have created more souls than one. Be sure that the ins and outs of your individuality are no mystery to Him; and one day they will no longer be a mystery to you. The mould in which a key is made would be a strange thing if you had never seen a lock. Your soul has a curious shape because it is a hollow made to fit a particular swelling in the infinite contours of the divine substance, or a key to unlock one of the doors in the house with many mansions. For it is not humanity in the abstract that is to be saved, by you—you, the individual reader, John Stubbs or Janet Smith. ….God will look to every soul like its first love because He is its first love. Your place in heaven will seem made for you and you alone, because you were made for it—made for it stitch by stitch as a glove is made for a hand.
- C. S. Lewis from The Problem of Pain (excerpted from the chapter: “Heaven”)