Matthew 23:15

From this place we learn that there will be a difference of torment in hell, seeing one is here said to be singly a child of hell, another twofold. And we ought to consider here whether it is possible that a man should be generally a child of hell, as a Jew, suppose, or a Gentile, or whether specially so in consequence of some particular sins; that as a righteous man is increased in glory by the abundance of his righteousnesses, so a sinner's punishment is increased manifold by the number of his sins.

That they compass sea and land signifies that throughout the whole world they shall be enemies of Christ's Gospel, and shall bring men under the yoke of the Law against the justification of faith. There were proselytes made into the Synagogue from among the Gentiles, the small number of whom is here denoted by what is said one proselyte. For after the preaching of Christ there was no faith left in their doctrine, but whoever was gained to the faith of the Jews became a child of hell. And he becomes the child of a twofold punishment, because he has not obtained remission of his Gentile sins, and because he has joined the society of those who persecuted Christ.

After this, again another charge: "Ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves;" that is, not even the fact that hardly ye have taken him, and with endless toils, induces you to be sparing towards him, although of the things we have hardly acquired, we are more sparing, but you not even this renders more gentle. Here He lays to their charge two things; one, that they are unprofitable for the salvation of the many, and need much toil in order to win over even one; another, that they were remiss in the preservation of him whom they had gained, or rather that they were not only careless, but even traitors, by their wickedness in their life corrupting him, and making him worse. For when the disciple sees his teachers to be such as these, he becomes worse than they. For he stops not at his teacher's wickedness; but as when his teacher is virtuous, he imitates him, so when he is bad, he even goes beyond him, by reason of our proneness to what is evil. And He calls him "a child of hell," that is, a very hell. And He said "twofold more than you," that He might both alarm those, and make these feel the more severely, because they are teachers of wickedness. And not this only, but because they labor to instill into their disciples a greater wickedness, hardening them to a much greater depravity than they have, and this is above all a mark of a depraved soul.

Or otherwise; The Scribes and Pharisees compassed the whole world to make proselytes of the Gentiles, that is, to mix the uncircumcised stranger with the people of God. Or, because before while he was a Gentile he erred in ignorance, and was only a child of hell; but seeing the vices of his masters, and understanding that they destroyed in their actions what they taught in words, he returns to his vomit, and becoming a Gentile, he is worthy of greater punishment as one that has deserted his cause. He is called a child of hell in the same way as one is said to be a child of perdition, and a child of this world; every man is called the son of him whose works he does.

(cont. Faust. xvi. 29. et cf. cont. Adimant. 16.) This He said not because proselytes were circumcised, but because they imitated the lives of those from following whom He had prohibited His disciples, saying, Do ye not after their works. Two things are observable in this command; first, the honour shown to Moses' teaching, (Matt. 23:3.) that even wicked men when sitting in his seat are compelled to teach good things; and that the proselyte is made a child of hell, not by hearing the words of the Law, but by following their doings. And twofold more than they for this reason, that he neglects to fulfil what he had undertaken of his own choice, having been not born a Jew, but of free will become a Jew.