Tertullian

“ Of that very thing, therefore, there will be predicated a contrariety in consequence of its diversity, to which there accrued a change of condition after an innovation. He who brought about the change, the same instituted the diversity also; He who foretold the innovation, the same announced beforehand the contrariety likewise. Why, in your interpretation, do you impute a difference in the state of things to a difference of powers? Why do you wrest to the Creator’s prejudice those examples from which you draw your antitheses, when you may recognise them all in His sensations and affections? ”

“ For from the rising of the sun, even unto the going down of the same, my name shall be great among the Gentiles; and in every place a sacrifice is offered unto my name, even a pure offering” [27] —meaning simple prayer from a pure conscience,—it is of necessity that every change which comes as the result of innovation, introduces a diversity in those things of which the change is made, from which diversity arises also a contrariety. For as there is nothing, after it has undergone a change, which does not become different, so there is nothing different which is not contrary. ”

“ You have not been able, unless I am misinformed, to recognise the fact, [31] that the world, at all events, [32] even amongst your people of Pontus, is made up of a diversity of elements which are hostile to one another. [33] It was therefore your bounden duty first to have determined that the god of the light was one being, and the god of darkness was another, in such wise that you might have been able to have distinctly asserted one of them to be the god of the law and the other the god of the gospel. ”