Who shall be invoked as the Lord of heaven, that does not first show Himself to have been the maker thereof? For He says, I thank you, (O Father,) and own You, Lord of heaven, because those things which had been hidden from the wise and prudent, You have revealed unto babes (Luke 10:21). What things are these? And whose? And by whom hidden? And by whom revealed? If it was by Marcion's god that they were hidden and revealed, it was an extremely iniquitous proceeding; for nothing at all had he ever produced in which anything could have been hidden — no prophecies, no parables, no visions, no evidences of things, or words, or names, obscured by allegories and figures, or cloudy enigmas, but he had concealed the greatness even of himself, which he was with all his might revealing by his Christ.
There are no doubts, not more: the Messianic Secret in Mark — his allegories, his figures, his cloudy enigmas —, is anti-marcionite.