Some interesting facts on of the trinity:
The Illustrated Bible Dictionary publication admits: “It is not a biblical doctrine in the sense that any formulation of it can be found in the Bible.”
Cardinal John O’Connor stated about the Trinity: “We know that it is a very profound mystery, which we don’t begin to understand.”
The Encyclopædia Britannica states: “Neither the word Trinity nor the explicit doctrine appears in the New Testament . . . The doctrine developed gradually over several centuries and through many controversies.”
The impression could arise that the Trinitarian dogma is in the last analysis a late 4th-century invention. In a sense, this is true . . . The formulation ‘one God in three Persons’ was not solidly established, certainly not fully assimilated into Christian life and its profession of faith, prior to the end of the 4th century.”—New Catholic Encyclopedia (1967), Volume 14, page 299.
“The Council of Nicaea met on May 20, 325 [C.E.]. Constantine himself presided, actively guiding the discussions, and personally proposed . . . the crucial formula expressing the relation of Christ to God in the creed issued by the council, ‘of one substance with the Father.’ . . . Overawed by the emperor, the bishops, with two exceptions only, signed the creed, many of them much against their inclination.”—Encyclopædia Britannica (1970), Volume 6, page 386.
Tthe New Bible Dictionary: “The term ‘Trinity’ is not itself found in the Bible. It was first used by Tertullian at the close of the 2nd century, but received wide currency [common use in intellectual discussion] and formal elucidation [clarification] only in the 4th and 5th centuries” (1996, “Trinity”.
Also: “the formal doctrine of the Trinity was the result of several inadequate attempts to explain who and what the Christian God really is . . . To deal with these problems the Church Fathers met in [A.D.] 325 at the Council of Nicaea to set out an orthodox biblical definition concerning the divine identity.” However, it wasn’t until 381, “at the Council of Constantinople, [that] the divinity of the Spirit was affirmed” (ibid.).
The New Unger’s Bible Dictionary, in its article on the Trinity, concedes that the Trinitarian concept is humanly incomprehensible: “It is admitted by all who thoughtfully deal with this subject that the Scripture revelation here leads us into the presence of a deep mystery; and that all human attempts at expression are of necessity imperfect” (1988, p. 1308).
Cyril Richardson, professor of church history at New York’s Union Theological Seminary, though a dedicated Trinitarian himself, said this in his book The Doctrine of The Trinity:
“My conclusion, then, about the doctrine of the Trinity is that ((((((((((it is an artificial construct)))))))))) . . . It produces confusion rather than clarification; and while the problems with which it deals are real ones, the solutions it offers are not illuminating. It has posed for many Christians dark and mysterious statements, which are ultimately meaningless, because it does not sufficiently discriminate in its use of terms” (1958, pp. 148-149).
He also admitted, “Much of the defense of the Trinity as a ‘revealed’ doctrine, is really an evasion of the objections that can be brought against it” (p. 16).
A Dictionary of Religious Knowledge states regarding the Trinity, “Precisely what that doctrine is, or rather precisely how it is to be explained, Trinitarians are not agreed among themselves” (Lyman Abbott, editor, 1885, “Trinitarians”.