John Chrysostom

What sayest thou? they that preach Christ, they that take not money, they that bring not in a different gospel, "false apostles?" 'Yes,' he saith, and for this very reason most of all, because they make pretense of all these things for the purpose of deceiving. "Deceitful workers," for they do work indeed, but pull up what has been planted. For being well aware that otherwise they would not be well received, they take the mask of truth and so enact the drama of error. …

Homily 24 on 2 Corinthians ↗

Theophylact of Ohrid

What are you saying? Those who preach Christ, who do not introduce a different Gospel, as he said above, have now become false apostles? Yes, he says, for this very reason; for, being hypocritical in this, they secretly introduce impious dogmas. And "evil workers," because they only appear to be building up, but in reality they uproot what had been planted, and, having only the outward appearance of apostles, are truly wolves in sheep's clothing.

Commentary on 2 Corinthians ↗

Clement of Alexandria

I have quoted these remarks to prove in error those Basilidians who do not live purely, supposing either that they have the power even to commit sin because of their perfection, or indeed that they will be saved by nature even if they sin in this life because they possess an innate election. For the original teachers of their doctrines do not allow one to do the same as they are now doing. …

The Stromata Book 3 ↗

Thomas Aquinas

For such men are false apostles, deceitful workmen. This can be connected with what went before in three ways; in the first way thus: they do not glory and strive in the way we do, for such men are false apostles, deceitful workmen. In the second way thus: and indeed they stop receiving in order to be like us: for such men are false apostles, deceitful workmen. In the third way thus: so they glory in not receiving in order to seem like us. …

Commentary on 2 Corinthians ↗