Another parable put he forth unto them, saying,
The kingdom of heaven is likened unto a man who sowed good seed in his field:
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Chromatius of Aquileia
AD 407
The Lord clearly points out that he is the sower of good seeds. He does not cease to sow in this world as in a field. God’s word is like good seed in the hearts of people, so that each of us according to the seeds sown in us by God may bear spiritual and heavenly fruit.
Another parable he proposed. As in the preceding parable our Lord spoke of those who did not receive the word, so in this he speaks of those who receive the corrupted word; for it is a diabolical machination to confound error with truth. (St. Chrysostom in St. Thomas Aquinas)
There are three things worthy of observation in this parable. 1st. That the Church of God on earth consists of both good and bad; the 2d. that God is not the author of evil; the 3d. that God does not always punish the wicked on the spot, but patiently bears with them. (Menochius)
What is the difference between this, and the parable before it? There He speaks of them that have not at all holden with Him, but have started aside, and have thrown away the seed; but here He means the societies of the heretics. For in order that not even this might disturb His disciples, He foretells it also, after having taught them why He speaks in parables. The former parable then means their not receiving Him; this, their receiving corrupters. For indeed this also is a part of the devil's craft, by the side of the truth always to bring in error, painting thereon many resemblances, so as easily to cheat the deceivable. Therefore He calls it not any other seed, but tares; which in appearance are somewhat like wheat.