Catena Aurea on Luke 1:36–38: Augustine of Hippo

But whoever says, “If God is omnipotent, let Him cause those things which have been done to have not been done,” does not perceive that he says, “Let Him cause those things which are true, in that very respect in which they are true to be false.” For He may cause a thing not to be which was, as when He makes a man who began to be by birth, not to be by death. But who can say that He makes not to be that which no longer is in being? For whatever is past is no longer in being. But if aught can happen to a thing, that thing is still in being to which any thing happens, and if it is, how is it past? Therefore that is not in being which we have truly said has been, because the truth is, in our opinions, not in that thing which no longer is. But this opinion God can not make false; and we do not so call God omnipotent as supposing also that He could die. He plainly is alone truly called omnipotent, who truly is, and by whom alone that is, whatever in any wise exists, whether spirit or body.