Matthew 19:17 - Matthew Poole's English Annotations on the Holy Bible

Mark omits the latter clause, and only saith, Thou knowest the commandments; so saith Luke, Luke 18:19,20. Our Saviour's design here was, not to show this young man by this answer the way by which it was possible that he or any other might come to heaven, but only to convince him of the errors of the Pharisaical doctrine. They would not own Christ to be God, nor to be come forth from God; they taught eternal life to be obtainable by the works of the law, and by a fulfilling of the law, according to that imperfect sense which they gave of it, of which we heard much, in Matthew 5:1-48. Now, saith our Saviour, seeing you will not own me to be God, nor yet to have come from God, why callest thou me good? There is none originally, essentially, and absolutely good, but God: there is none derivatively good, but he derives his goodness from God. How callest thou me good, whom thou wilt neither own to be God, nor to derive from God? But if thou will enter into life, keep the commandments. This was the doctrine of the Pharisees, That men might keep the commandments. Saith our Saviour, The way to eternal life, according to your doctrine, is plain before thee. You say, men may perfectly keep the commandments of God. He that doth so shall be saved. Therefore keep the commandments. Not that our Saviour thought he could do it, or that there did lie a passable road to heaven that way, but that he might convince him of his error, and the need he had of a Saviour.