Jeremias 31

Jeremias 31:33

It was probable, however, that the holy apostles would perhaps think these things difficult to put into practice. Therefore he who knows all things takes the natural law of self-love as the arbiter of what any one would wish to obtain from another. Treat others, he says, such as you wish them to treat you. If you would have them harsh and unfeeling, fierce and wrathful, revengeful and ill-disposed, treat them this way. But if, on the contrary, you would have them kind and forgiving, do not think it a thing intolerable to be so yourselves. And in the case of those so disposed, the law is perhaps unnecessary, because God writes on our hearts the knowledge of his will. "For in those days," says the Lord, "I will surely give my laws into their minds and will write them on their hearts." — COMMENTARY ON LUKE, HOMILY 29