Matt. XII. 33.
Either make the tree good, and his fruit good, or else make the tree corrupt, and his fruit corrupt; for the tree is known by his fruit.
Again in another way He shames them, and is not content with His former refutations. But this He does, 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 has either found fault about the persons healed, as not being healed; nor has 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 says, Even if you 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, says 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 you 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, you 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.
Then since He is arguing not for Himself, but for the Spirit, He has dealt out His reproof even as a torrent, saying, O generation of vipers, how can you, being evil, speak good things?
Now this is at once to accuse, and to give demonstration of His own sayings from their case. For behold, says He, you being evil trees, cannot bring forth good fruit. I do not then marvel at your talking thus: for you were both ill nurtured, being of wicked ancestors, and you have acquired a bad mind.
And see how carefully, and without any hold for exception, He has expressed His accusations: in that He said not, How can you speak good things, being a generation of vipers? (for this latter is nothing to the former): but, How can you, being evil, speak good things?
But He called them broods of vipers, because they prided themselves on their forefathers. To signify therefore that they had no advantage thereby, He both casts them out from their relationship to Abraham, and assigns them forefathers of kindred disposition, having stripped them of that ground of illustriousness.
For out of the abundance of the heart the mouth speaks. Here again He indicates His Godhead, which knew their secrets: and that not for words only, but also for wicked thoughts, they shall suffer punishment; and that He knows it all, as God. And He says, that it is possible even for men to know these things; for this is a natural consequence, that when wickedness is overflowing within, its words should be poured forth through the lips. So that when you hear a man speak wicked words, do not suppose only so much wickedness to be in him as the words display, but conjecture the fountain to be much more abundant; for that which is spoken outwardly, is the superabundance of that which is within.
See how vehemently He reprehends them. For if what they had said is so evil, and is of the very mind of the devil, consider the root and well-spring of their words, how far that must reach. And this is naturally the case; for while the tongue through shame often pours not forth all its wickedness at once, the heart having no human witness, fearlessly gives birth to whatever evils it will; for of God it has not much regard. Since then men’s sayings come to examination and are set before all, but the heart is concealed; therefore the evils of the former grow less, while those of the latter increase. But when that within is multiplied, all that has been awhile hidden comes forth with a violent gushing. And as persons vomiting strive at first to keep down the humors that force their way out, but, when they are overcome, cast forth much abomination; so do they that devise evil things, and speak ill of their neighbors.