The doctrine of the Trinity is not an extrapolation from Scripture. It is set forth in Scripture. In numerous places, Christ is said to be the Son of God. Christ refers to God as the Father. Christ says that the Father will send a comforter to the disciples when Christ leaves the Earth…the Holy Spirit. The concept is explicit. What is not explicit is the word “Trinity”. I think your analogy does not hold.
the doctrine of the Trinity is by no means explicit. it must be extrapolated from a number of passages, and the orthodox reading of those passages was (and still is) disputed – hence the need for the church councils that progressively hammered out the doctrine.
thus, for example, we read that Jesus is “the firstborn of all creation.” colossians 1:15. this comports perfectly with the arian view, and can only with difficulty be reconciled with the orthodox view of the Incarnation. similar difficulties arise with a number of other passages.
and even if those difficulties were set aside, there is the conceptual difficulty – devising concepts and accompanying terminology to articulate the unheard-of and naturally inconceivable doctrine of the Trinity. scripture offers no or very little help in that regard. concepts and terminology (such as “
hypostasis” or “
ousia”) had to be imported from greek philosophy to make sense of the implicit teaching of scripture.
and again, this was the work of the church – whose authority respecting the development of doctrine you accept when it accords with your preferences (say, regarding the canon of the new testament, or the doctrine of the Trinity), and reject when it does not (say, regarding eucharistic adoration).
but by what authority do you do these things?
by the authority to interpret scripture by your own lights vested in you by the reformation? well then, where did the reformers get this authority?
certainly not from scripture.
certainly not from historic Christianity.
in short, to be deep in history is to cease to be a protestant, as newman argued, from a deep scholarly understanding of the fathers and the history of the early church, as set forth in his
essay on the development of Christian doctrine.
a book you should read, btw. because you don’t have to live like a refugee.
