The Great Commandment (Mr 12:28-34).

      "But when the Pharisees had heard that He had put the Sadducees to silence, they were gathered together" (Mt 22:34).

      28. And one of the scribes--"a lawyer," says Matthew (Mt 22:35); that is, teacher of the law.
      came, and having heard them reasoning together, and perceiving that he had answered them well, asked him--manifestly in no bad spirit. When Matthew (Mt 22:35) therefore says he came "tempting," or "trying him," as one of the Pharisaic party who seemed to enjoy the defeat He had given to the Sadducees, we may suppose that though somewhat priding himself upon his insight into the law, and not indisposed to measure his knowledge with One in whom he had not yet learned to believe, he was nevertheless an honest-hearted, fair disputant.
      Which is the first commandment of all?--first in importance; the primary, leading commandment, the most fundamental one. This was a question which, with some others, divided the Jewish teachers into rival schools. Our Lord's answer is in a strain of respect very different from what He showed to cavillers--ever observing His own direction, "Give not that which is holy to the dogs, neither cast ye your pearls before swine; lest they trample them under their feet, and turn again and rend you" (Mt 7:6).

JFB.