And their word will eat as does a canker: of whom is Hymenaeus and Philetus;
All Commentaries on 2 Timothy 2:17 Go To 2 Timothy 2
Cyprian of Carthage
AD 258
But if we consider what the apostles thought about heretics, we shall find that they, in all their epistles, execrated and detested the sacrilegious wickedness of heretics. For when they say that "their word creeps as a canker".
Flee from such men as much as you can; avoid with a wholesome caution those who adhere to their mischievous contact. Their word doth eat as doth a cancer;.
Also in the second to Timothy: "Their word doth creep as a canker."