There is kindness in Love: but Love and kindness are not coterminous, and when kindness…is separated from the other elements of Love, it involves a certain fundamental indifference to its object, and even something like contempt of it. Kindness consents very readily to the removal of its object — we have all met people whose kindness to animals is constantly leading them to kill animals lest they suffer. Kindness, merely as such, cares not whether its object becomes good or bad, provided only that it escapes suffering. As Scripture points out, it is bastards who are spoiled: the legitimate sons, who are to carry on the family tradition, are punished. It is for people whom we care nothing about that we demand happiness on any terms: with our friends, our lovers, our children, we are exacting and would rather see them suffer much than be happy in contemptible and estranging modes. If God is Love, He is, by definition, something more than mere kindness. And it appears, from all the records, that though He has often rebuked us and condemned us, He has never regarded us with contempt. He has paid us the intolerable compliment of loving us, in the deepest, most tragic, most inexorable sense.
— C.S. Lewis