No writer ever taught or avowed a belief in any tenet of religious faith more fully or plainly than Plato sets forth, the doctrine of the Trinity in his Phaedon, written four hundred years B. C. And his terms are found to be in most striking conformity to the Christian doctrine on this subject, as taught in the New Testament Plato's first term for the Trinity was in Greek--1. To Agathon, the supreme God or Father. 2. The Logos, which is the Greek term for the Word. And, 3. Psyche, which the Greek Lexicon defines to mean "soul, spirit or ghost"--of course, the Holy Ghost. Here we have the three terms of the Christian Trinity, Father, Word, and Holy Ghost, as plainly taught as language can express it, thus making Plato's exposition of the Trinity and definition of its terms, published four hundred years B. C., identical in meaning with those of St. John's, as found in his Gospel, and contained in the above quoted text. Where, then, is the foundation for the dogmatic claim on the part of the Christian professors for the divine origin of the Trinity doctrine? We will here cite the testimony of some Christian writers to prove that the Trinity is a pagan-derived doctrine. A _Christian bishop_, Mr. Powell, declares, "I not only confess but I _maintain_, such a similitude of Plato's and John's Trinity doctrines as bespeaks a common origin." (Thirteenth letter to Dr. Priestley.) What is that you say, bishop? "A common origin." Then you concede both are heaven-derived, or both heathen-derived. If the former, then revelation and heathenism are synonymous terms. If the latter, then Christianity stands on a level with heathen mythology. Which horn of the dilemma will you choose? St. Augustine confessed he found the beginning of John's Gospel in Plato's Phædon, which is a concession of the whole ground. Another writer, Chataubron, speaks of an ancient Greek inscription on the great obelisk at Rome, which reads--1. The Mighty God. 2. The Begotten of God as Christ is declared to be "the only begotten of the Father" (John i. 14). And, 3. "Apollo the Spirit"--the Holy Spirit or Holy Ghost--thus presenting in plain language the three terms of the Trinity. And Mr. Cudworth, in corroboration of this report, says, "The Greeks had a first God, and second God, and third God, and the second was begotten by the first. And yet for all that," continues Mr. Cudworth, "they considered all these one."