Tertullian

I might be thought to have laid down this position to remedy distrust in my case, or from a desire of entering on the contest in some other way, were there not reasons on my side, especially this, that our faith owes deference to the apostle, who forbids us to enter on "questions," or to lend our ears to new-fangled statements, or to consort with a heretic "after the first and second admonition," not, (be it observed, ) after discussion.