The Holy Spirit as life and energy. The treatment of Athanasius' Ad Serapionem I, 20-21 in the late thirteenth century and its implications for the hesychast controversy

Ad Serapionem I, 20 by Athanasius was of paramount importance for theology of Nicephorus Blemmydes, John XI Beccus and Gregory of Cyprus. Blemmydes seems to have produced several changes of words in the passage making Athanasius say of the Spirit as of the Life and Energy of the Son. In such a form Ad Serapionem I, 20 gave Blemmydes an excellent opportunity for substantiating his own doctrine on the Spirit's eternal illumination through the Son. In his teaching no strict demarkation line had been drawn between the Person and energy of the Spirit. Nicephorus might have tried to approach to a more " essentialist" discourse in triadology, e.g., like that which is found in Symeon the New Theologian. By his sometimes ambiguous, but generally fresh and suggestive pneumatology Nicephorus has paved the way for Gregory of Cyprus, Gregory Palamas and the Palamites. While taken at face value, Nicephorus' teaching seemed to open a path for early Scholastics, with John Beccus at their head, as well as for subsequent anti-Palamites, whereas the Palamites took pains to interpret Blemmydes along the lines of traditional Cappadocian, Maximian and Photian triadology