See how Mani, the last of the great heretics, is refuted by Ezek. viii.

And because this is the Teaching which comes from the party of Marcion and Valentinus and Bardaisan and he is the last of all, that is to say, the dregs, lower than that above him, so this one (i.e., Mani) is more abominable than those before him. But in the evil times of the world this Teaching has sprung up in the world's latter time. And because it has fought much against the Truth, let us speak a little against it, and it is not [P. 125, l.18.] we, but the Truth which speaks against it. But the substance of this Teaching while appearing small and insignificant to those simple ones who are not acquainted with it is like the hole which the Blessed Ezekiel saw in the wall. For though that hole was insignificant and small, great evils and numerous abominations and the secret things of shame were inside it. [Ezek.viii. 8.] But that passage (of Scripture) which commanded Ezekiel to dig in the wall which was a veil over the hateful things, by the power of that holy passage, let us also remove the veil of this foul teaching so that the hated things inside it may be exposed. [xciii] But I do not wish to speak of all of them because they are [P. 126.] unclean, just as the holy Prophet was unable to make his mouth a channel for the hateful filth. . . .