And now also the ax is laid unto the root of the trees: therefore every tree which brings not forth good fruit is hewn down, and cast into the fire.
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John Chrysostom
AD 407
As a skilful physician from the colour of the skin infers the sick man's disease, so John understood the evil thoughts of the Pharisees who came to him. They thought perhaps, We go, and confess our sins; he imposes no burden on us, we will be baptized, and get indulgence for sin. Fools! if ye have eaten of impurity, must ye not needs take physic? So after confession and baptism, a man needs much diligence to heal the wound of sin; therefore he says, “Generation of vipers. "It is the nature of the viper as soon as it has bit a man to fly to the water, which, if it cannot find it, straightway dies; so this “progeny of vipers,” after having committed deadly sin, ran to baptism, that, like vipers, they might escape death by means of water. Moreover it is the nature of vipers to burst the insides of their mothers, and so to be born. The Jews then are therefore called “progeny of vipers,” because by continual persecution of the prophets they had corrupted their mother the Synagogue. Also vipers have abeautiful and speckled outside, but are filled with poison within. So these men's countenances wore a holy appearance.
Or “who hath showed you?” Was it Esaias? Surely no; had he taught you, you would not put your trust in water only, but also in good works; he thus speaks, "Wash you, and be clean; put your wickedness away from your souls, learn to dowell.” surely not, for he adds immediately, “The sacrifice of God is a broken spirit.” If then ye had been the disciple of David, ye would have come to baptism with mournings.
Hom. 11: He does not forbid them to “say” they are his, but to trust in that, neglecting virtues of the soul.
What avails noble birth to him whose life is disgraceful? Or, on the other hand, what hurt is a low origin to him who has the lustre of virtue? It is fitter that the parents of such a son should rejoice over him, than he over his parents. So do not you pride yourselves on having Abraham for your father, rather blush that you inherit his blood, but not his holiness. He who has no resemblance to his father is possibly the offspring of adultery. These words then only exclude boasting on account of birth.
That men should be made out of stones, is like Isaac coming from Sarah’s womb; "Look into the rock,” says Isaiah, “whence ye were hewn.” Reminding them thus of this prophecy, he shows that it is possible that the like might even how happen.
Stone is hard to work, but when wrought to some shape, it loses it not; so the Gentiles were hardly brought to the faith, but once brought they abide in it for ever.
The axe is that most sharp fury of the consummation of all things, that is to hew down the whole world. But if it be already laid, how hath it not yet cut down? Because these trees have reason and free power to do good, or leave undone; so that when they see the axe laid to their root, they may fear and bring forth fruit. This denunciation of wrath then, which is meant by the laying of the axe to the root, though it have no effect on the bad, yet will sever the good from the bad.
By saying, “Every,” he cuts off all privilege of nobility: as much as to say, Though thou be the son of Abraham, if thou abide fruitless thou shalt suffer the punishment.