12:28-34 Those who sincerely desire to be taught their duty, Christ will guide in judgment, and teach his way. He tells the scribe that the great commandment, which indeed includes all, is, that of loving God with all our hearts. Wherever this is the ruling principle in the soul, there is a disposition to every other duty. Loving God with all our heart, will engage us to every thing by which he will be pleased. The sacrifices only represented the atonements for men's transgressions of the moral law; they were of no power except as they expressed repentance and faith in the promised Saviour, and as they led to moral obedience. And because we have not thus loved God and man, but the very reverse, therefore we are condemned sinners; we need repentance, and we need mercy. Christ approved what the scribe said, and encouraged him. He stood fair for further advance; for this knowledge of the law leads to conviction of sin, to repentance, to discovery of our need of mercy, and understanding the way of justification by Christ.

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).