Matthew 12:33

Thus did He at that present refute the Jews, who seeing Christ's works to be of power more than human, would notwithstanding not allow the hand of God. And at the same time He convicts all future errors of the faith, such as that of those who taking away from the Lord His divinity, and communion of the Father's substance, have fallen into divers heresies; having their habitation neither under the plea of ignorance as the Gentiles, nor yet within the knowledge of the truth. He figures Himself as a tree set in the body, seeing that through the inward fruitfulness of His power sprung forth abundant richness of fruit. Therefore either must be made a good tree with good fruits, or an evil tree with evil fruits; not that a good tree is to be made a bad tree, or the reverse; but that in this metaphor we may understand that Christ is either to be left in fruitlessness, or to be retained in the fruitfulness of good works. But to hold one's self neuter, to attribute some things to Christ, but to deny Him those things that are highest, to worship Him as God, and yet to deny Him a common substance with the Father, is blasphemy against the Spirit. In admiration of His so great works you dare not take away the name of God, yet through malevolence of soul you debase His high nature by denying His participation of the Father's substance.

Again in another way He shames them, and is not content with His former refutations. But this He doth, not freeing Himself from accusations, (for what went before was quite enough), but as wishing to amend them. Now His meaning is like this: none of you hath either found fault about the persons healed, as not being healed; nor hath said, that it is an evil thing to deliver one from a devil. For though they had been ever so shameless, they could not have said this. Since therefore they brought no charge against the works, but were defaming the Doer of them, He signifies that this accusation is against both the common modes of reasoning, and the congruity of the circumstances. A thing of aggravated shamelessness, not only to interpret maliciously, but also to make up such charges as are contrary to men's common notions. And see how free He is from contentiousness. For He said not, "Make the tree good, forasmuch as the fruit also is good;" but, most entirely stopping their mouths, and exhibiting His own considerateness, and their insolence, He saith, Even if ye are minded to find fault with my works, I forbid it not at all, only bring not inconsistent and contradictory charges. For thus were they sure to be most clearly detected, persisting against what was too palpable. Wherefore to no purpose is your maliciousness, saith He, and your self-contradictory statements. Because in truth the distinction of the tree is shown by the fruit, not the fruit by the tree; but ye do the contrary. For what if the tree be the origin of the fruit; yet it is the fruit that makes the tree to be known. And it were consistent, either in blaming us to find fault with our works too, or praising these, to set us who do them free from these charges. But now ye do the contrary; for having no fault to find with the works, which is the fruit, ye pass the opposite judgment upon the tree, calling me a demoniac; which is utter insanity. Yea, and what He had said before, this He establishes now also; that a good tree cannot bring forth evil fruit, nor again can the converse be. So that their charges were against all consistency and nature.

Thus He holds them in a syllogism which the Greeks call 'Aphycton,' the unavoidable; which shuts in the person questioned on both sides, and presses him with either horn. If, He saith, the Devil be evil, he cannot do good works; so that if the works you see be good, it follows that the Devil was not the agent thereof. For it cannot be that good should come of evil, or evil of good.

(Serm. 72. 1.) Or this is an admonition to ourselves that we should be good trees that we may be able to bring forth good fruit; Make the tree good, and its fruit good, is a precept of health to which obedience is necessary. But what He says, Make the tree corrupt, and its fruit corrupt, is not a command to do, but a warning to take heed, spoken against those who being evil thought that they could speak good things, or have good works; this the Lord declares is impossible. The man must be changed first, that his works may be changed; for if the man remains in that wherein he is evil, he cannot have good works; if he remains in that wherein he is good, he cannot have evil works. Christ found us all corrupt trees, but gave power to become sons of God to them that believe on His name.