5 Since, then, this double fatherhood of nature and adoption removes the difficulty arising from the discrepancy of the genealogies, there is no occasion for Faustus to leave the two evangelists and betake himself to the other two, which would be a greater affront to those he betook himself to than to those he left. For the sacred writers do not desire to be favored at the expense of their brethren. For their joy is in union, and they are one in Christ; and if one says one thing, and another another, or one in one way and another in another, still they all speak truth, and in no way contradict one another; only let the reader be reverent and humble, not in an heretical spirit seeking occasion for strife, but with a believing heart desiring edification. Now, in this opinion that the evangelists give the ancestors of different fathers, as it is quite possible for a man to have two fathers, there is nothing inconsistent with truth. So the evangelists are harmonized, and you, by Faustus's promise are bound to yield at once.
Source: Reply to Faustus the Manichaean (New Advent)