Luke 6:43

Our Lord continues the words which He had begun against the hypocrites, saying, For a good tree brings not forth corrupt fruit; i.e. as if He says, If you would have a true and unfeigned righteousness, what you set forth in words make up also in works, for the hypocrite though he pretends to be good is not good, who does evil works; and the innocent though he be blamed, is not therefore evil, who does good works.

But take not these words to thyself as an encouragement to idleness, for the tree is moved conformably to its nature but you have the exercise of free will; and every barren tree has been ordained for some good, but you were created to the good work of virtue.

He does not then exclude repentance, but a continuance in evil, which as long as it is evil cannot bring forth good fruit, but being converted to virtue, will yield abundance. But what nature is to the tree, our affections are to us. If then a corrupt tree cannot bring forth good fruit, how shall a corrupt heart?

But although the fruit is caused by the tree, yet, it brings to us the knowledge of the tree, because the distinctive nature of the tree is made evident by the fruit, as it follows, For every tree is know by its fruit.

Each man’s life also will be a criterion of his character. For not by extrinsic ornaments and pretended humility is the beauty of true happiness discovered, but by those things which a man does; of which he gives an illustration, adding, For of thorns men do not gather figs.

On the thorns of this world the fig cannot be found, which as being better in its second fruit, is well fitted to be a similitude of the resurrection. Either because, as you read, The fig trees have put forth their green figs, that is, the unripe and worthless fruit came first in the Synagogue. Or because our life is imperfect in the flesh, perfect in the resurrection, and therefore we ought to cast far from us worldly cares, which eat into the mind and scorch up the soul, that by diligent culture we may obtain the perfect fruits. This therefore has reference to the world and the resurrection, the next to the soul and the body, as it follows, Nor of a bramble bush gather they grapes. Either because no one living in sin obtains fruit to his soul, which like the grape nearest the ground is rotten, on the higher branches becomes ripe. Or because no one can escape the condemnations of the flesh, but he whom Christ has redeemed, Who as a grape hung on the tree.

Or, I think the thorns and bramble are the cares of the world and the prickings of sin, but the figs and the grapes are the sweetness of a new life and the warmth of love, but the fig is not gathered from the thorns nor the grape from the bramble, because the mind still debased by the habits of the old man may pretend to, but cannot bring forth the fruits of the new man. But we must know, that as the fruitful palm tree is enclosed and supported by a hedge, and the thorn bearing fruit not its own, preserves it for the use of man, so the words and acts of the wicked wherein they serve the good are not done by the wicked themselves, but by the wisdom of God working upon them.

But having shown that the good and the bad man may be discerned by their works as a tree by its fruits, he now sets forth the same thing by another figure, saying, A good man out of the good treasure of his heart brings forth that which is good, and the evil man out of the evil treasure brings forth that which is evil.

The treasure of the heart is the same as the root of the tree. He therefore who has in his heart the treasure of patience and perfect love, brings forth the best fruits, loving his enemy, and doing the other things which have been taught above. But he who keeps a bad treasure in his heart does the contrary to this.

The quality of the words shows the heart from which they proceed, plainly manifesting the inclination of our thoughts. Hence it follows, For out of the abundance of the heart the mouth speaks.

For it is a natural consequence when wickedness abounds within, that wicked words are breathed as far as the mouth; and therefore when you hear of a man uttering abominable things, do not suppose that there lies only so much wickedness in him as is expressed in his words, but believe the fountain to be more copious than the stream.

By the speaking of the mouth the Lord signifies all things, which by word, or deed, or thought, we bring forth from the heart. For it is the manner of the Scripture to put words for deeds.

For since all forms of speech flow from mind and manners, ludicrous expressions could not be uttered, did they not proceed from ludicrous practices. For the saying, “It is not a good tree which produces corrupt fruit, nor a corrupt tree which produces good fruit,” is to be applied in this case. For speech is the fruit of the mind. If, then, wags are to be ejected from our society, we ourselves must by no manner of means be allowed to stir up laughter. For it were absurd to be found imitators of things of which we are prohibited to be listeners; and still more absurd for a man to set about making himself a laughing-stock, that is, the butt of insult and derision. …

Now, if the soul possessed this uniform and simple nature from the beginning in Adam, previous to so many mental dispositions (being developed out of it), it is not rendered multiform by such various development, nor by the triple form predicated of it in “ the Valentinian trinity ” (that we may still keep the condemnation of that heresy in view), for not even this nature is discoverable in Adam. What had he that was spiritual? Is it because he prophetically declared “the great mystery of Christ and the church?” “This is bone of my bone, and flesh of my flesh: she shall be called Woman. Therefore shall a man leave his father and mother, and he shall cleave unto his wife; and they two shall be one flesh.” But this (gift of prophecy) only came on him afterwards, when God infused into him the ecstasy, or spiritual quality, in which prophecy consists. …