7368. It is said "for the sake of himself and those who belong to him," because he together with these, and these together with him, make a one; just as when anyone does anything for the sake of his wife, of his children, grandchildren, sons-in-law, or daughters-in-law, he does it for the sake of himself, because they are his. In like manner one who does anything for the sake of relatives and of friends who favor his love and thereby conjoin themselves with him; for by such conjunction they make one with him, that is, regard themselves in him, and him in themselves.