I'm not going to type out the whole parable, as it's a bit lengthy, but I'm about to post on the Wheat and Tares parable from Matthew 13. It's from verses 24-30.
I've seen this verse used before in describing those destined for heaven and those for hell. Obviously, the wheat are the saved, and the tares are the lost. But can we really say that the wheat and tares represent people?
The farmer would clearly be the Son of Man (given that it's what Jesus said), who has created the "wheat," if we're using a people comparison. That works. God creates all of humanity. Then the enemy comes, and sows the tares. Here's where the comparison would fall apart for me: only God can create man. The enemy cannot. So we can't then say that the enemy also created other people, which are the tares. But if the tares aren't created people, then can we really say that the wheat are also created people?
Except Jesus does -- in verses 37-43, he says that the good seed are the children of the Kingdom, and the tares are the children of the evil one. When the harvest comes, the angels will gather everything that makes men stumble, and those whose deeds are evil, and they'll be thrown into a blazing furnace, while the righteous will shine as bright as the sun.
This is almost taking universalistic tendencies at this point, since every person on this earth would have to be the wheat. The enemy can't create. Yet the tares are specifically called the children of the evil one, and are separate from the wheat. They grow together, but always remain separate. There's also no point at which a tare becomes a wheat. The wheat belongs to the Creator from the very moment it's planted. Same with the tares.
(On a side note, Jesus says that the Son of Man is the sower of the good seed. But I'm not sure that we can then say the Son of Man is the Creator, because he simply planted the seeds, he didn't create the seeds that were planted).
The tares are almost two-fold. They are things that cause men to stumble, as well as those who deeds are evil (and another interesting thing: this is action-oriented only, with no mention of faith. Deeds are what get the tares out of the kingdom). However, while the tares are called the children of the devil, are they ever referred to as men? In the explanation, Jesus says "those/them" which do evil things. But he never says "people." Simply because he earlier says the children, can we really say that it's the same kind of children?
The other interesting thing about this parable is that it refers to the kingdom of God, and it's not something that is seen as instantaneous. In the parables before and after this, the kingdom of God is something that takes time to develop. It's also something that people are a part of at that moment, not something that people step into after death. In this particular parable, the enemy is also within this kingdom, sowing tares, and those tares are gathered out of the kingdom at the end of time.