Jesus taught his disciples in parables because these simple illustrations made a lasting impression. So, for instance, when he told this parable:
‘The kingdom of Heaven may be compared to a man who sowed good seed in his field. While everybody was asleep his enemy came, sowed darnel all among the wheat, and made off. When the new wheat sprouted and ripened, then the darnel appeared as well. The owner’s labourers went to him and said, “Sir, was it not good seed that you sowed in your field? If so, where does the darnel come from?” He said to them, “Some enemy has done this.” And the labourers said, “Do you want us to go and weed it out?” But he said, “No, because when you weed out the darnel you might pull up the wheat with it. Let them both grow till the harvest; and at harvest time I shall say to the reapers: First collect the darnel and tie it in bundles to be burnt, then gather the wheat into my barn.” ‘ (Matt. 13:24-30)
His point was a simple one- made powerfully: every Church, every community of faith, has both weeds and wheat and it’s God’s job to sort them out on the day of Judgement. Not ours.
Our job is to act like wheat- that is, produce fruit, not like tares (darnel) which produces nothing. And our task is to examine our own lives to see if we are wheat (and we know it because we produce fruit) or weed (and we know that too because if we are we produce nothing). Wheat uses the soil and the water (the resources of God) to bring forth fruit while weeds use soil and water (the resources of God) only for self.
Every Church has weeds. And the punishment for weedyness is hell while the reward for wheatyness is heaven.