Luke 18:20

Thou knowest, &c.--Matthew (Mat 19:17) is more complete here: "but if thou wilt enter into life, keep the commandments. He saith unto him, Which--as if he had said, Point me out one of them which I have not kept?--"Jesus said, Thou shalt," &c. (Mat 19:17-18). Our Lord purposely confines Himself to the second table, which He would consider easy to keep, enumerating them all--for in Mark (Mar 10:19), "Defraud not" stands for the tenth (else the eighth is twice repeated). In Matthew (Mat 19:19) the sum of this second table of the law is added, "Thou shalt love thy neighbor as thyself," as if to see if he would venture to say he had kept that.

In this chapter we have, I. The parable of the importunate widow, designed to teach us fervency in prayer (Luk 18:1-8). II. The parable of the Pharisee and publican, designed to teach us humility, and humiliation for sin, in prayer (Luk 18:9-14). III. Christ's favour to little children that were brought to him (Luk 18:15-17). IV. The trial of a rich man that had a mind to follow Christ, whether he loved better Christ or his riches; his coming short upon that trial; and Christ's discourse with his disciples upon that occasion (Luk 18:18-30). V. Christ's foretelling his own death and sufferings (Luk 18:31-34). VI. His restoring sight to a blind man (Luk 18:35-43). And these four passages we had before in Matthew and Mark.

18:20 you know the commandments: Jesus cites the fifth through ninth of the Ten Commandments (Exod 20:12-16; Deut 5:16-20), which pertain to relationships between human beings.