Now, notice that when Jesus asks the rich young man, “Why do you call me good?” He is asking a serious question. He never says, "I am not good, only God is good. As John Chrysostom pointed out many hundreds of years ago…
When he [Jesus] says, “No one is good,” he does not say this to show that he is not good; far from it. For he does not say, “Why do you call me good? I am not good” but “No one is good,” that is, no human being. When he says this, he does not mean to exclude men from goodness but to make a comparison with the goodness of God. (John Chrysostom, Homilies on the Gospel of Matthew, 63.1)
I wouldn’t make sense for Jesus to mean “I am not good,” and then add, "You lack one thing; go, sell what you own, and give the money to the poor, and you will have treasure in heaven; then come, follow me.”
What then is Jesus claiming?
If Jesus is really saying, “I am NOT good," then he would also be saying, “I am NOT God.” That is the whole point, of your posting these lines, no?
That is a problem.
Jesus is adding something to the Ten Commandments. the necessity of following – not Yahweh or HIS Law (He doesn’t say, “Go and follow Yahweh!”) – but of following him – Jesus.
If Jesus is really claiming that he is NOT good, then why is he saying, “You have to follow me If you want eternal life." Would it make sense for Jesus to mean “You have to follow me because… I am really wicked. I’m a bad man?”
Remember the logic: If Jesus is denying that he is good, then he is also denying that he is God. And if he is denying that he is God, then it doesn’t make any sense for him to tell the guy that the only thing he is lacking for eternal life is to follow him, the not very good Jesus who is also not God.