Tertullian

“ If God was unknown and concealed, He was overshadowed in such a region of darkness, as must have been itself new and unknown, and be even now likewise uncertain—some immense region indeed, one undoubtedly greater than the God whom it concealed. ”

“ Convince me there could have been an unknown god. I find, no doubt, [3] that altars have been lavished on unknown gods; that, however, is the idolatry of Athens. And on uncertain gods; but that, too, is only Roman superstition. Furthermore, uncertain gods are not well known, because no certainty about them exists; and because of this uncertainty they are therefore unknown. Now, which of these two titles shall we carve for Marcion’s god? Both, I suppose, as for a being who is still uncertain, and was formerly unknown. For inasmuch as the Creator, being a known God, caused him to be unknown ”

“ In the present question two gods are propounded, the unknown and the known. Concerning the known there is no [11] question. It is plain that He exists, else He would not be known. The dispute is concerning the unknown god. Possibly he has no existence; because, if he had, he would have been known. Now that which, so long as it is unknown, is an object to be questioned, is an uncertainty so long as it remains thus questionable; and all the while it is in this state of uncertainty, it possibly has no existence at all. You have a god who is so far certain, as he is known ”