The New Testament is the inspired word of God, written by the hands of men under the inspiration of the Holy Spirit.
So was the Old Testament.
So are a lot of other things written by men, especially the Didache of the 12 Apostles.
My point was that if you take Jesus absolutely literally in the quote from the Gospels that you cited, JESUS tells YOU (not me) that the New Testament is NOT Scripture, because he says that nothing can be added to Scripture, and when Jesus said that, the only Scripture there was, was the Old Testament (which, by the way, included the Books of the Maccabbees, which features the atonement of the sins of the dead by the prayers of the living).
I assume that you use the KJV, which struck out 2 Maccabees, thereby deleting words of the Scriptures and defying what Jesus said in the passage you cited.
I assume you also treat the New Testament as Scripture, which is adding to Scripture as Jesus referred to it in that passage, given that not one word of any of the NT had been written when Jesus said those words.
I don't deny that the Bible is the inspired word of God, Old and New Testament.
I categorically deny that it is the only writing that God inspired, and also that the Bible is all one needs.
The Bible is not necessary to walk with God.
Only the real presence of the Holy Spirit is.
There are evil spirits too. The Church is necessary to help people keep the evil ones at bay and walk with the Holy Spirit.
The Bible is GOOD, but it's not God, and on its own it's just the work of human hands inspired by God. So was Mother Theresa's orphanage, but we don't worship her. We shouldn't exaggerate the importance of the Bible. That starts to get us into legalisms and lapses into idolatry.
Always good to know where you are coming from - once again in order to perpetuate the mythology of doctrine not supported by Scripture there is a need to undermine the authority of the Bible.