Right on. Main thing anyway is that in the Kingdom of God, God is King, not the ego. In Christian terminology, ego = the unregenerste self, the self that has not yet died and been reborn in Jesus.
The Kingdom of God starts as an internal transformation in a person and leads to an external manifestation that changes the world. So it's an ongoing process. Jesus describes it as seed that grows or yeast that spreads in dough.
Yeast in the Scriptures is mostly used to illustrate sin, not the Kingdom of God, that is why unleavened bread was used represent sinless Jesus.
Perhaps this parable is a continuation of the previous parable and shows the just like weeds grew among the wheat, unrepentant sinners would be hiding among true Christians at the time of the end.
I think the passage means that weeds(sin) within each person will taken away and burned because no one is without sin.
Perhaps reading Matthew 13:36-43 will help you understand what Jesus is saying. Then after dismissing the crowds he went into the house. And his disciples came to him and said: “Explain to us the illustration of the weeds in the field.” In response he said: “The sower of the fine seed is the Son of man; the field is the world; as for the fine seed, these are the sons of the kingdom; but the weeds are the sons of the wicked one, and the enemy that sowed them is the Devil. The harvest is a conclusion of a system of things, and the reapers are angels. Therefore, just as the weeds are collected and burned with fire, so it will be in the conclusion of the system of things. *The Son of man will send forth his angels, and they will collect out from his kingdom all things that cause stumbling and persons who are doing lawlessness, and they will pitch them into the fiery furnace. There is where [their] weeping and the gnashing of [their] teeth will be. At that time the righteous ones will shine as brightly as the sun in the kingdom of their Father. Let him that has ears listen. (Matthew 13:36-43)
I know I've read that many times, but the problem is no one is righteous. (Romans 3:9) Everyone has evil in them. That's where faith in Christ and the acceptance of the free gift comes in because as Jesus said it's impossible to get through narrow door by our own effort.
What I was pointing out is that you said the weeds are the sin within the person whereas in the scripture that I pointed out, where Jesus explains the illustration, Jesus says that “the weeds are the sons of the wicked one” and not the sin within a person.
I'm just trying to understand the parable in light of what Paul said in Romans about no one being righteous. The parable says that those who are lawless are thrown away, but everyone is lawless to a certain degree.
I guess it says persons who are doing lawlessness, but isn't lawlessness sin which everyone is guilty of?
Yes, lawlessness is sin. (1 John 3:4) Everyone who practices sin is also practicing lawlessness, and so sin is lawlessness. So the question is why two different words if they mean the same thing? Well there is a slight difference. Yes we are all sinners but as Matthew 13:36-43 points out although all humans are sinners only the lawless will be destroyed. When one thinks of some one who is lawless, one tends to think of someone who is in a revolt, a planned, deliberate rebellion against the law and not someone who is sinful because he has fallen short of perfection.