Note 457 — LECTURE VII. THE UNSCRIPTURAL ORIGIN AND ECCLESIASTICAL HISTORY OF THE DOCTRINE OF THE TRINITY. BY REV. JOHN HAMILTON THOM.
Reading edition
“That this Trinity (Monad or Good, Wisdom, Spirit or Energy) was not first of all a mere invention of Plato’s, but much ancienter than him, is plainly affirmed by Plotinus in these words,—‘That these doctrines are not new nor of yesterday, but have been very anciently delivered, though obscurely (the discourses now extant being but Explications of them) appears from Plato’s own writings; Parmenides before having insisted on them.’” Cudworth. Intel. Syst. p. 546.—See also Bishop Berkeley’s Siris, sections 341-365.