No one is good except God alone

A rich young man came with a question and called Jesus Christ as "Good Teacher" - As Jesus started on his way, a man ran up to him and fell on his knees before him. “Good teacher,” he asked, “what must I do to inherit eternal life?” - Mark 10:17

The Bible says that God (Jesus Christ) alone is Good (Psalm 25:8, 135:3), So Jesus Christ asked about his confession? “Why do you call me good?” Jesus answered. “No one is good - except God alone”. You know the commandments: You shall not murder, you shall not commit adultery, you shall not steal, you shall not give false testimony, you shall not defraud, honor your father and mother - Mark 10:18-19

So the rich man carefully removed the word "Good", and called Jesus Christ as "Teacher" - And he said to him, “Teacher", all these I have kept from my youth - Mark 10:20

And when rich man said, "I have kept all these commandments from my youth", it became a lie and portraying self righteous, because Lord already confirmed that no one keeps the law - Has not Moses given you the law? Yet none of you keeps the law. Why do you seek to kill me? -  John 7:19

and also when the rich man said "I have kept all these commandments from my youth" he was confessing that he does not required of any savior.

The very moment, he acknowledged Jesus Christ is not God by removing the word "Good", He became unworthy for God's eternal kingdom - And Jesus, looking at him, loved him, and said to him, “You lack one thing: go, sell all that you have and give to the poor, and you will have treasure in heaven; and come, follow me.” Disheartened by the saying, he went away sorrowful, for he had great possessions - Mark 10:21-22

Because Jesus Christ is God, and He will lead us into his eternal kingdom - And Jesus looked around and said to his disciples, “How difficult it will be for those who have wealth to enter the kingdom of God!” And the disciples were amazed at his words. But Jesus said to them again, “Children, how difficult it is to enter the kingdom of God! It is easier for a camel to go through the eye of a needle than for a rich person to enter the kingdom of God.” And they were exceedingly astonished, and said to him, “Then who can be saved?” Jesus looked at them and said, “With man it is impossible, but not with God. For all things are possible with God (Jesus Christ)” - Mark 10:23-27