24 Jesus presented another parable to them, saying, “The kingdom of heaven may be compared to a man who sowed good seed in his field. 25 But while his men were sleeping, his enemy came and sowed tares among the wheat, and went away. 26 But when the wheat sprouted and bore grain, then the tares became evident also. 27 The slaves of the landowner came and said to him, ‘Sir, did you not sow good seed in your field? How then does it have tares?’ 28 And he said to them, ‘An enemy has done this!’ The slaves said to him, ‘Do you want us, then, to go and gather them up?’ 29 But he said, ‘No; for while you are gathering up the tares, you may uproot the wheat with them. 30 Allow both to grow together until the harvest; and in the time of the harvest I will say to the reapers, “First gather up the tares and bind them in bundles to burn them up; but gather the wheat into my barn.”’”
– Matthew 13:24-30
It isn’t easy, is it, to separate the tares and the wheat? And many of us would rather just gather up the tares, regardless of whether or not the wheat gets uprooted. Usually those who want to “gather up the tares” without worrying too much about the consequences for the wheat think about human nature in terms of Thomas Sowell’s “unconstrained vision”. I think the Bible, to the extent it teaches us anything about human nature (and I obviously think it does) pretty clearly suggests human nature has a “constrained vision”.