Luke 18:20 Meaning

18And a certain ruler asked him, saying, Good Master, what shall I do to inherit eternal life?

19And Jesus said unto him, Why callest thou me good? none is good, save one, that is, God.

20Thou knowest the commandments, Do not commit adultery, Do not kill, Do not steal, Do not bear false witness, Honour thy father and thy mother.

21And he said, All these have I kept from my youth up.

22Now when Jesus heard these things, he said unto him, Yet lackest thou one thing: sell all that thou hast, and distribute unto the poor, and thou shalt have treasure in heaven: and come, follow me.