 During his years in Greece, Bessarion adopted traditionalist positions, which included hostility toward the tenets of the Roman Church and Scholastic theology, which conflicted with the Hesicastic contemplative doctrines still dominant in Greece at that time. The experience of the Council of Ferrara-Florence led him to question and abandon some of his previous convictions. This is evident in the Refutationes of two writings, respectively by Maximus Planudes (13–14th c.) and Marcos Eugenikos (d. 1444, present himself at the Council), in which Bessarion defended the procession of the Spirit from the Son. In other writings, and particularly in the Encyclical letter to the Greeks, composed when he became Patriarch of Constantinople, he emphasized the primacy of the Roman Pontiff, inviting the Greeks to restore the union of the two Churches which had fallen apart after the Council. In On the Eucharist, which he translated from Greek to Latin and re-elaborated several times over more than two decades, Bessarion defended the epiclesis in the Orthodox Eucharist.