“At first the Christian faith was not Trinitarian…It was not so in the apostolic and sub-apostolic ages, as reflected in the New Testament and other early Christian writings” (Encyclopedia of Religion and Ethics, ed. James Hastings, 1922, Vol. 12, p. 461).
“The propositions constitutive of the dogma of the Trinity were not drawn from the New Testament and could not be expressed in New Testament terms. They were the products of reason speculating on a revelation to faith. . . they were only formed through centuries of effort, only elaborated by the aid of the conceptions and formulated in the terms of Greek and Roman metaphysics.” (Source: Encyclopedia Britannica)
tafj.org 
“At first the Christian faith was not Trinitarian…It was not so in the apostolic and sub-apostolic ages, as reflected in the New Testament and other early Christian writings” (Encyclopedia of Religion and Ethics, ed. James Hastings, 1922, Vol. 12, p. 461).
“The propositions constitutive of the dogma of the Trinity were not drawn from the New Testament and could not be expressed in New Testament terms. They were the products of reason speculating on a revelation to faith. . . they were only formed through centuries of effort, only elaborated by the aid of the conceptions and formulated in the terms of Greek and Roman metaphysics.” (Source: Encyclopedia Britannica)