(20) Thou knowest the commandments.--St. Luke here agrees with St. Matthew in omitting the "defraud not," which we find in St. Mark.

Verse 20. - Thou knowest the commandments. The report in St. Matthew is somewhat fuller. There the ruler, when directed to the commandments, replies by asking "which?" expecting most likely to be referred to some of the elaborate traditional laws of the rabbinic schools, which were difficult to keep even by men in the position of a wealthy Pharisee; but to his surprise Jesus mentions the most general and best-known of the ancient ten.

18:18-30 Many have a great deal in them very commendable, yet perish for lack of some one thing; so this ruler could not bear Christ's terms, which would part between him and his estate. Many who are loth to leave Christ, yet do leave him. After a long struggle between their convictions and their corruptions, their corruptions carry the day. They are very sorry that they cannot serve both; but if one must be quitted, it shall be their God, not their wordly gain. Their boasted obedience will be found mere outside show; the love of the world in some form or other lies at the root. Men are apt to speak too much of what they have left and lost, of what they have done and suffered for Christ, as Peter did. But we should rather be ashamed that there has been any regret or difficulty in doing it.Thou knowest the commandments,.... The ten commandments given to Moses, and delivered to people; and which they were careful to teach their children; though five are only here mentioned, and not in the order in which they stand: suggesting hereby that these must be kept, or the law must he fulfilled, and satisfaction made for the violation of it, or there can be no inheriting eternal life. The five commandments mentioned are, the seventh, sixth, eighth, ninth, and fifth:

do not commit adultery; do not kill; do not steal; do not bear false witness; honour father and thy mother; See Gill on Matthew 19:17 and See Gill on Mark 10:19.