From 325 AD at the Council of Nicea up to about the 8th century, councils have been held to determine the correct nature of God. It was eventually decided that the bible reveals a triune god- one god existing as three divine persons. Although shrouded in mystery and containing contradictions that are labeled "beyond our human comprehension", the trinity doctrine has been the most popular Christology for centuries. According to the Westminister Confession of Faith:
“The whole counsel of God, concerning all things necessary for his own glory, man’s salvation, faith, and life, is either expressly set down in scripture, or by good and necessary consequence may be deduced from scripture: unto which nothing at any time is to be added, whether by new revelations of the Spirit, or traditions of men.”
Suppose I work my way up the ranks to become a respected and exalted member of the church. One day, I have a divine revelation that Wisdom is not merely personified in the bible, but is the fourth person of the Quadrilateral god. Of course, my idea would have many critics. They may say "Proverbs 8:22–30 says Wisdom was brought forth, so it cannot be the eternal god", to which I'd reply "Wisdom is eternally brought-forth through the eternal generation" or something.
I would show that Wisdom is described as a person that can speak, think, and that Jesus even says she has her own children. I could even quote Theophilus of Antioch to show that I'm not the only one who believes Wisdom is a divine person of God.
Anyways, my question isn't about whether the Quadinity is true.
Is the trinity a completed doctrine and too sacred to be reformulated, or do Reformed churches allow alternative ideas to be presented and considered?