The parable of the wheat and the weeds (the wheat and tares in the King James Version) is the Lord Jesus' own prediction of conditions in the church during the age between his first coming and his second -- this present age in which we live. The whole series of parables there in Matthew 13 describes this, but in the parable of the wheat and the tares he said particularly that he, the son of Man, would begin by sowing in the field of the world those who would have the life of God in them, the sons of the kingdom. Shortly thereafter would appear certain signs of evil put there by the devil. The devil would also sow, he said, and do his sowing amidst the wheat so that right in the middle of the wheat would grow up weeds.