“Sabellius has been usually assigned to the middle of third century, Mr. Clinton giving a.d. 256–270 as his active period.  The discovery of the Philosophumena of Hippolytus has proved this to be a mistake, and thrown his period back to the close of the second and beginning of the third century.…He was in full activity in Rome during the Episcopate of Zephyrinus, a.d. 198–217.”  Professor Stokes in D. C. Biog. iv. 569.  For Basil’s views of Sabellianism vide Epp. CCX., CCXIV., CCXXXV.  In his Hær. Fab. Conf. ii. 9 Theodoret writes:  “Sabellius said that Father, Son, and Holy Ghost were one Hypostasis; one Person under three names; and he describes the same now as Father, now as Son, now as Holy Ghost.  He says that in the old Testament He gave laws as Father, was incarnate in the new as Son, and visited the Apostles as Holy Ghost.”  So in the ῎Εκθεσις τῆς κατὰ μέρος πίστεως, a work falsely attributed to Gregory Thaumaturgus, and possibly due to Apollinaris, (cf. Theod., Dial. iii.) “We shun Sabellius, who says that Father and Son are the same, calling Him who speaks Father, and the Word, remaining in the Father and at the time of creation manifested, and, on the completion of things returning to the Father, Son.  He says the same of the Holy Ghost.”