On this question the Greeks disagree with the Latins. I have found, however, in a note of Lincoln [i.e. Robert Grosseteste] . . . that the Greeks really did not disagree with the Latins, because the opinion of the Greeks is that the Holy Spirit proceeds from the Father through the Son. In this way, therefore, two wise men, one Greek and the other Latin, not lovers of proper speech but of divine zeal, would perhaps find the disagreement not to be real, but one of words, for otherwise either the Latins or the Greeks would be heretics. But who wishes to say that Basil, Gregory of Nazianzus, Gregory of Nyssa, Damascene, Chrysostom and many other excellent doctors are heretics; and for the other part that Ambrose, Jerome, Augustine, Gregory, Hilary, etc., who were the most excellent Latin doctors, are heretics? Perhaps modern Greeks have added to the aforesaid article from their obstinacy what the preceding doctors have not said or understood. This must be held, therefore, that the Holy Spirit proceeds from the Father and the Son, because the Church declares this. . . . . . one must say that many things were transmitted explicitly in the later creeds that were contained implicitly in the first ones. Hence, heresies were the occasion of expressing and explaining truths, and therefore, in the first creed it was not necessary to explain, because then there was no heresy. Afterwards, however, there was, and a new creed followed, and with as much authority as those before had. Hence there is no corruption of the first creed, but an explanation; nor did we make another creed, but a new one from it.
--Scotus, Reportatio I-A Dist. 11 Q.2, trans. Wolter and Bychkov.