Tertullian

He calls Christ "the image of the invisible God." We in like manner say that the Father of Christ is invisible, for we know that it was the Son who was seen in ancient times (whenever any appearance was vouchsafed to men in the name of God) as the image of (the Father) Himself.

If Christ is not "the first-begotten before every creature," as that "Word of God by whom all things were made, and without whom nothing was made; " if "all things were" not "in Him created, whether in heaven or on earth, visible and invisible, whether they be thrones or dominions, or principalities, or powers; "if "all things were" not "created by Him and for Him" (for these truths Marcion ought not to allow concerning Him), then the apostle could not have so positively laid it down, that "He is before all.

It is well for us that in another passage (the apostle) calls Christ "the image of the invisible God." For will it not follow with equal force from that passage, that Christ is not truly God, because the apostle places Him in the image of God, if, (as Marcion contends, ) He is not truly man because of His having taken on Him the form or image of a man? For in both cases the true substance will have to be excluded, if image (or "fashion") and likeness and form shall be claimed for a phantom.