If I asked the question, what is the most predominate means of adding to scripture, I expect I would be greeted with crickets.
Jesus warned about this in John 14:23-24 & John 15:20 Peter testifies that it was happening already in his day as those wresting the scriptures and not just Paul's writings in 2 Peter 3:15-17
I see Paul having to contend with a false teaching that the resurrection had happened already that overthrew the faith of some in 2 Timothy 2:18 and yet I find that false teaching inserted out of place in verses 52-53 of the event in Matthew 27:45-54 of what the centurion was seeing Christ on the cross, therefore verses 52-53 is a lie that was added to scripture.
Paul also had to contend with
tongue for private users as if they are being self edified in that way for why Paul was exhorting believers to study the scriptures in 2 Timothy 2:15-16 and shun vain profane babbling. So 1 Corinthians 14:4 is a lie since Paul instructed for those that speak in tongues, to pray for an interpretation because until it is interpreted, it is unfruitful to the tongue speaker until he understands it per 1 Corinthians 14:12-15 and so how can 1 Corinthians 14:4 be true when tongues cannot edify self? It is an outright lie and so obviously added scripture. Paul even set the precedent for all the gifts of the Spirit in 1 Corinthians 12:4 to profit the body of Christ 1 Corinthians 12:7 and so no member of the body can tell any other member of the body that they have no need of them which tongues for private users are saying the same thing in verse 21 of 1 Corinthians 12:19-21. Indeed, in the operation of the gifts of tongues and prophesy, 2 or 3 witnesses are required to established that testimony as coming from God in 1 Corinthians 14:27-29 & 2 Corinthians 13:1 & Matthew 18:16
It is right there in our faces and we allow these wrested scriptures to be used by tongues for private users,
Then you have John 16:13 in all Bible versions testifying that the Holy Spirit cannot speak from Himself at all and so the Holy Spirit cannot turn God's gift of tongues around for Himself to speak back to God and so 1 Corinthians 14:2 is a lie and I dare say the word "unto" should be switched out with from to get the truth in His words since the holy Spirit is not speaking any mysteries to God but from God to men. Same goes for 1 Corinthians 14:28 for how can anyone be commanded to be silent in the church and yet still speak to himself and to God? It is annoying today when people are whispering beside you and you are trying to hear what is being said and we have a sound system too and so imagine anyone trying to use verse 28 as if it is okay for them to use tongues for private use "quietly" in the church. It is not of the Lord at all.
There can be no lie of the truth and yet I can see now why I am stuck with correcting tongues for private users because someone wrest the scriptures to teach that tongues are for self edification when it can never be because that is the epitome of confusion when they cannot prove they are being self edified from when supposedly the Holy Spirit praying out loud for them. And so they try to be wise in their own eyes and say they know. Really? Then why did Paul instruct those in church to ray that someone may interpret so they can understand that tongue for that tongue to be fruitful to the tongue speaker as well?
It is apostasy for how they gained that kind of tongue and that is for looking to receive that baptism with the Holy Ghost with evidence of tongues which Jesus warned against for any believer to do as becoming an adulterous generation in Matthew 12:38-40 and unless they repent and pray normally & be edified by scriptures, and chase no more after the Holy Spirit to receive again after any other sensational signs of confusion in the flesh, they are at risk of being left behind Revelation 2:18-25
If I asked the question, what is the most predominate means of deleting scripture, again I expect I would be greeted with crickets.
1 John 5:7 about the Three witnesses in heaven was originally scripture as it was cited as such in debates ranging far back as 200 A.D. in debates over the Trinity & deity of Jesus Christ.
Chick.com: Is 1 John 5:7 not in any Greek manuscript before the 1600s? If it is true, why is it in the KJV?
So let's back up and ask what group was the most predominate in adding to scripture in the New Testament?
Hopefully many would answer, the Pharisees.
I expect even a few would answer the question, what group was most predominate in deleting scripture, with the Sadducees. An old joke is that the reason they were "sad, you see". is they did not believe in the resurrection.
The Pharisees were guilty of legalism, of manufacturing doctrines and using them to "lord it over" the Israelites.
Jesus said by their traditions, they made scripture to no effect.
Yet what early church would even allow Sadducees and Pharisees be near the scriptures that they had, but Jesus did say those that did not love Him will not keep His words nor the sayings of His disciples and so one can imagine imposters infiltrating he churches for the sake of changing the scriptures here or there without anyone noticing and apparently, succeeding too, but we have enough of His words as truth to spot the lies when verses are running against scripture with the Lord's help per 1 Thessalonians 5: 21-24 & James 1:5-8 & 1 John 2:20-21 & 1 John 2:26-28 & Hebrews 4:12-16
Today, we have the liberal "Easy Believism" doctrine, which makes an accommodation for the flesh. And on the other hand we have legalism which has manufactured doctrine.
John 6:39 And this is the Father's will which hath sent me,
that of all which he hath given me I should lose nothing, but should raise it up again at the last day. 40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.
Ephesians 4:30 And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
Easy believism or OSAS is true BUT there is a consequence for not living that reconciled relationship with God the Father through Jesus Christ and that is
if one is found in unrepentant iniquity by the time the Bridegroom comes, they will be excommunicated from attending the Marriage Supper in Heaven 1 Corinthians 5:8-11 and left behind to die 1 Corinthians 5:4-5 & Revelation 2:18-25 & 2 Corinthians 5:7-11 & note verse 15 of 1 Corinthians 3:10-17 in spite of physical death in vs 16-17