How good is good enough? Does God expect me to be perfect?

• In Matthew 19 is Jesus teaching that no one is good but God. That no one follows every law. That someone will think that they do, but it isn't good enough. And once again, in verse 21, Jesus mentions the need to be perfect. Jesus is insisting that the only way into the Kingdom is perfection! We know that no one is perfect. (1 John 1:8-9; James 3:2) Yet here He is, the judge of the world, insisting on, demanding perfection! So how do we resolve this?(see also Matthew 5:17-20 and 48)
  
  Matthew 19: 16-25
  And someone came to Him and said, “Teacher, what good thing shall I do that I may obtain eternal life?” And He said to him, “Why are you asking Me about what is good? There is only One who is good; but if you wish to enter into life, keep the commandments.” Then he said to Him, “Which ones?” And Jesus said, “YOU SHALL NOT COMMIT MURDER; YOU SHALL NOT COMMIT ADULTERY; YOU SHALL NOT STEAL; YOU SHALL NOT BEAR FALSE WITNESS; HONOR YOUR FATHER AND MOTHER; and YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF.” 
  
  The young man said to Him, “All these things I have kept; what am I still lacking?” Jesus said to him, “If you wish to be perfect, go and sell your possessions and give to the poor, and you will have treasure in heaven; and come, follow Me.” But when the young man heard this statement, he went away grieving; for he was one who owned much property. And Jesus said to His disciples, “Truly I say to you, it is hard for a rich man to enter the kingdom of heaven. “Again I say to you, it is easier for a camel to go through the eye of a needle, than for a rich man to enter the kingdom of God.”
  
  When the disciples heard this, they were very astonished and said, “Then who can be saved?”
  
  "You must be perfect, as your Heavenly Father is perfect" says Jesus at Matthew 5:48
   

  "But wait a minute", I think, "David sinned and got punished, but God thought he was perfect enough to be in his kingdom, having salvation, how can this be?"

  
  Let's see what David has to say about it: "Blessed is the one whose transgressions are forgiven, whose sins are covered." Psalm 37:21 and Romans 4:7
  
  Romans 3 explains about David: "First of all, the Jews were entrusted with the whole revelation of God. 3True, some of them were unfaithful; but just because they were unfaithful, does that mean God will be unfaithful?"
  
  
  

  20 For no one can ever be made right with God by doing what the law commands. The law simply shows us how sinful we are.21 But now God has shown us a way to be made right with him without keeping the requirements of the law, as was promised in the writings of Mosesⁱ and the prophets long ago. 22 We are made right with God by placing our faith in Jesus Christ. And this is true for everyone who believes, no matter who we are.

  23 For everyone has sinned; we all fall short of God’s glorious standard. 24 Yet God, with undeserved kindness, declares that we are righteous. He did this through Christ Jesus when he freed us from the penalty for our sins. 25 For God presented Jesus as the sacrifice for sin. 

  People are made right with God when they believe that Jesus sacrificed his life, shedding his blood. 

  
  
  

  Now keep in mind our question, why is David promised God's Kingdom when we know he was not perfect? Read on in Romans 3:

  
  This sacrifice shows that God was being fair when he held back and did not punish those who sinned in times past, 26 for he was looking ahead and including them in what he would do in this present time. God did this to demonstrate his righteousness, for he himself is fair and just, and he declares sinners to be right in his sight when they believe in Jesus.
  
  When Jesus' sacrfice is applied to us... we are perfect. Forever perfect, even as we are still being sanctified. "For by one sacrifice he has made perfect forever those who are being made holy." Hebrews 10:14
  
  

  God declares sinners to be right in his sight, yes, perfect! When we believe in Jesus. Romans 3:26