And as all Christians know there is another way of giving to God; every stranger whom we feed or clothe is Christ. And this apparently is Gift-love to God whether we know it or not. Love Himself can work in those who know nothing of Him. The “sheep” in the parable had no idea either of the God hidden in the prisoner whom they visited or of the God hidden in themselves when they made the visit. (I take the whole parable to be about the judgment of the heathen. For it begins by saying, in the Greek, that the Lord will summon all “the nations” before Him—presumably, the Gentiles, the Goyim.)
C.S. Lewis, The Four Loves (1960; Harcourt Brace: 1991) 129.