The Gospel is the manifestation of the Holy Spirit to men; The living Word.
Doctrine is the defining of that Holy Spirit in the lives of men, in Precepts, lifestyle and moral action.
The Lord Jesus, the Light of the World, also proclaimed He was the Path; He manifested both in fullness.
Why is Doctrine important then? Can't we all just get along? We must look at Doctrine to be the the pathway, and the Spirit to be the flashlight; the illumination of what is holy and anointed.
This is the vortex of War, and has been since the beginning; the Garden. "Has God said?" Satan's desire is to twist the simple commands of God, and by doing so, and stumbling mankind, they drift off of that path, and there-by their faith in God cannot be fulfilled. By believing a lie, you begin to worship in the direction of that lie.
There are appx: 38,000 "Christian" denominations in the world, with tens and tens of thousands of non-affiliated independent Christian churches, but only one true Bride.
"I do not believe in a uniform faith, with one singular doctrine and identity in the Worldwide church. Jesus Himself made this clear, I believe, when He separately addressed the 7 churches of Asia; each one, differently.
"John to the seven churches that are in Asia: Grace to you and peace, from Him who is and who was and who is to come, and from the seven Spirits who are before His throne."
.. and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To Him who loves us and released us from our sins by His blood."
These "Spirits" before the Throne are eternal, obviously, the burning candlesticks. The churches in themselves were temporal; none remain in these areas, though modern churches may be there. So, why all the fuss, why not just speak to John and have him deliver the Word to each of these local churches? Why create them into the Eternity of it all, and fix them into Throne authority forever and ever?
I believe that the Lord is showing us how we can become One with Him and with each other, and yet be different in our personality, our tolerances, and reactions to Himself. He also established Eternal Doctrines in choosing these local churches, Sovereignly exposing and addressing each one, and responding with TRUTH.
I believe that each one of these churches were Sovereignly allowed to suffer and overcome a variety of circumstance. Why? So that our quiver would be full. After the Resurrection, the Apostles, Paul most directly, was given the pure thought, and expressed it fully, in perfect union with all doctrine and faith, from Abraham on.
"The Seven Churches " is the "Full Cup", the completion of our ideas and paths in issues that WILL arise; riches, the Priest/Minister/Pastor class..[ Nicolaitan], that destroys body life and body function, persecution and affliction, and holy deeds implemented.
We are one body but all of us with different personalities, both individually and corporately....but there is such a thing as Sound doctrine, and is it important? Jesus thought it was, for if you begin to think astray, your heart and faith will follow.
This is what falling away is about.