The view that the Holy Spirit is not a distinct person has been considered to be heretical by mainstream Christianity, including Roman Catholicism. For example, Epiphanius of Salamis referred to some of those as Semi-Arians and Pneumatomachi ("spirit-fighters") and called them, "A sort of monstrous, half-formed people of two natures … Semi-Arians … hold the truly orthodox view of the Son, that he was forever with the Father...but has been begotten without beginning and not in time … But all of these blaspheme the Holy Spirit, and do not count him in the Godhead with the Father and the Son" (Epiphanius. The Panarion of Epiphanius of Salamis, Books II and III (Sects 47-80), De Fide). Section VI, Verses 1,1 and 1,3. Translated by Frank Williams. EJ Brill, New York, 1994, pp.471-472)