In conformity to this, He shews that he is not to be forbidden, adding immediately after, “For there is no man which shall do a miracle in My name, that can lightly speak evil of Me.” He says “lightly” to meet the case of those who fell into heresy, such as were Simon and Menander, and Cerinthus [ed. note: Irenaeus, cont. Haer. 2, 31, seems to imply that the early heretics actually worked wonders, but that these differed from Christian miracles in that they were done by magic through the aid of the devil, and were not works of mercy; he contrasts with these the ecclesiastical miracles of his day.]; not that they did miracles in the name of Christ, but by their deceptions had the appearance of doing them.
But these others, though they do not follow us, cannot however set themselves to say any thing against us, because they honour My name by working miracles.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Vict. Ant. e Cat. in Marc.