***The claim of the Catholic/Orthodox Church that the church always and everywhere believed thus and so fails due to the Church intentionally eliminating manuscripts and beliefs hated by those in power.***
Heresy almost broke the early Church many times. Heretical beliefs were strongly dealt with both because they would divide the Church into factions, much as the Reformation did to the Protestants, but even more so because they were wrong and anti Christian.
***A well established example of the elimination of documents and beliefs is the Book of Enoch which was rejected by the powers that were in the Church (Philastrius, circa 380) even though the early Christians loved it and relied on it - as is evident by its being quoted in Jude and terms and phrases in Enoch being used in many other places throughout the New Testament.
Were it not for Ethiopia where it was rediscovered in 1775, Enoch would have been lost until it was found in the Dead Sea Scrolls, the copies there being carbon dated to about 200 b.c. IOW, the Book of Enoch is much older even than that, i.e. ancient by any measure.
Now the Church includes it in its collected writings - but for more than a 1,000 years it was “eliminated” because the Church hated it back in 380!***
Which Church authority hated it and banned it at what time?
***alternative interpretations of church history should be treated with courtesy. ***
How would you approach somebody that strongly believed that the world was flat and that the sun moved around the earth?
you: How?
The words of God come from God, not man. It doesn't matter who He chooses to convey them or make a record of them - whether Moses, David, prophets, councils of Jews or Christians or a few goatherders in Qumran.
God's words are not constrained by the worthiness or position of mortals. Even Nebuchadnezzar (Dan 4:37) and Caiphas (John 11:49-52) conveyed words of God. It is a deep Spiritual error in a man to be proud that God has used him to sing His praises.
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, [they] are spirit, and [they] are life. - John 6:63
He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day. - John 12:48
Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God. Matthew 22:29
The Berean test
Spiritual discernment
But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
But God hath revealed [them] unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God. For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God. Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.
But he that is spiritual judgeth all things, yet he himself is judged of no man. For who hath known the mind of the Lord, that he may instruct him? But we have the mind of Christ. - I Corinthians 2:6-16
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, [they] are spirit, and [they] are life. - John 6:63
But ye believe not, because ye are not of my sheep, as I said unto you. My sheep hear my voice, and I know them, and they follow me: And I give unto them eternal life; and they shall never perish, neither shall any [man] pluck them out of my hand. My Father, which gave [them] me, is greater than all; and no [man] is able to pluck [them] out of my Father's hand. I and [my] Father are one. John 10:26-30
Submit yourselves therefore to God. Resist the devil, and he will flee from you. James 4:7
Fruits of the Spirit
Do men gather grapes of thorns, or figs of thistles? Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. A good tree cannot bring forth evil fruit, neither [can] a corrupt tree bring forth good fruit. Every tree that bringeth not forth good fruit is hewn down, and cast into the fire. Wherefore by their fruits ye shall know them. - Matthew 7:15-20
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, Meekness, temperance: against such there is no law. - Galatians 5:22-23
We are wise to also apply the fruit test to ourselves, regularly - kind of like taking our spiritual "vitals."
For instance, when a Christian is anxious then something is spiritually amiss, something is obstructing the Spirit of Christ in him. On the other hand, when he is full of peace, there is no cause for alarm - at least on that point.
Beware the hirelings, thieves and robbers. (John 10:1-15)