Matthew's parables are intended only for Jesus' disciples because they concern kingdom work that only they can perform. The moment Jesus describes here occurs at the very end of this age, just as this age ends and the next one begins. It will have reached the end of a seven-year period of unparalleled supernatural judgments in the history of the world. Matthew's parable of the Master and Tares shows that atheists can mimic the claims and actions of Christians. The main point of this parable is that the master instructs us not to uproot the wheat.
Since the master was unwilling to lose even a single wheat plant, he ordered that no wheat plants be lost. You and I are the wheat stalks; Jesus' primary goal in sowing this world's field is to bring each of us into the Kingdom. Christians who fail to bear fruit are those who are distracted and troubled by the world. They neglect their walk with Christ; they fail to devote time and energy to the work of the Kingdom; and they don't produce fruit. The enemy works to diminish the Lord's harvest, but the Lord allows it because He cares for you.
Parable of the Wheat and the Tares