In Jesus’ explanation of this parable, He identifies the enemy as Satan and the tares as the sons of the evil one. The wheat are the sons of the Kingdom.
Jesus is very savvy. And merciful. Spares the tares immediate death. Gives them time. Lets them live among the Sons of the Kingdom. But He also states there is a deadline and what will happen at the harvest at the end of the age.
We are introduced to additional workers in this parable. Reapers. The planting is done and it is now time for the harvest. Reapers are those who cut the plants and gather them into the barn. They are identified as the angels. The harvest time is the end of the age, which is to come.
Matthew 13:37-42; Revelation 14:14-20
Grace says that we speak the truth in love about someone’s sin and that we let them know that Jesus doesn’t care how bad or how long of sin you’ve had… you are welcome. You must repent of your sin and He will help you. He will save you from the coming Wrath of God and the Harvest of the unrighteous.