The Trinity is the central doctrine of the Christian faith because it is the doctrine of God Himself. Getting it wrong renders all other theological pursuits nonsensical. Like attempting to learn scuba-diving in the middle of the Great Sand Dunes. It might feel like a complicated doctrine, but we ought not to be intimidated by this doctrine. It’s not as if you won’t be let into heaven if you once were teaching a Sunday School class and used eggs as a metaphor for the Trinity. Just don’t do it again. This is one doctrine where charity should be shown in the articulation of it; severe strictness should be shown to someone who is in error and then doubles down on his error after being shown his error. St. Augustine once hedged his entire book on the Trinity with this, “If herein I am foolish, let him who knows better correct me.” To which I reply, “Ditto.”