The rich young man’s wealth and life-long obedience to the law means he has every reason to believe his eternal life inheritance is in the bank and yet he still asks the question, “what must I do?” The disciples who don’t understand his question or Jesus’ response for that matter have their deposit in the same account. If he’s not in the money what hope do we have? Even their response “we have left everything…” is a way of gaming the “what must I do” system so that God has to pay out on whatever winning hand we think we have. But “for God all things are possible” means we have nothing to do with whatever God has decided is possible for God to do which of course is all things including the unthinkable. God can give eternal life to whomever God pleases to give it to. But that also means God can withhold eternal life from whomever God chooses to withhold it. Truth is God can do whatever God wants to do. Of course in the cross we see the One who was obedient since the beginning give up all he had for the sake of a world impoverished by sin which might lead one to believe the love God has for the human family makes the question “what must I do?” meaningless. That doesn’t mean obedience to the commandments or giving up everything for the sake of the poor are not desirable things to do only that in God’s way of gaming there are no winning tickets to eternal life except Jesus Christ.