Of course man is useful to man, because his body is a marvelous machine  and his mind an organ of wonderful efficiency. But he is a spirit as  well, and this spirit is truly known only by love. When we define a man  by the market value of the service we can expect of him, we know him  imperfectly. With this limited knowledge of him it becomes easy for us  to be unjust to him and to entertain feelings of triumphant  self-congratulation when, on account of some cruel advantage on our  side, we can get out of him much more than we have paid for. But when we  know him as a spirit we know him as our own. We at once feel that  cruelty to him is cruelty to ourselves, to make him small is stealing  from our own humanity.
