Golden Rule (Mt 7:12).

      12. Therefore--to say all in one word.
      all things whatsoever ye would that men should do to you, do ye even so to them--the same thing and in the same way.
      for this is the law and the prophets--"This is the substance of all relative duty; all Scripture in a nutshell." Incomparable summary! How well called "the royal law!" (Jas 2:8; compare Ro 13:9). It is true that similar maxims are found floating in the writings of the cultivated Greeks and Romans, and naturally enough in the Rabbinical writings. But so expressed as it is here--in immediate connection with, and as the sum of such duties as has been just enjoined, and such principles as had been before taught--it is to be found nowhere else. And the best commentary upon this fact is, that never till our Lord came down thus to teach did men effectually and widely exemplify it in their practice. The precise sense of the maxim is best referred to common sense. It is not, of course, what--in our wayward, capricious, gasping moods--we should wish that men would do to us, that we are to hold ourselves bound to do to them; but only what--in the exercise of an impartial judgment, and putting ourselves in their place--we consider it reasonable that they should do to us, that we are to do to them.

JFB.