What the Bible Says on Canonicity

The superintending of the canon as well as the preservation of it is a question concerning the providence of God, and the particular God of scripture. If the sort of God in scripture spoke to us, then implicit in that proposition is that he will insure we hear what he spoke to us. God knows what he inspired and intended us to receive. And there are no shortage of scriptures indicating his promise of preservation of his words.
(Isa.59:21,Isa.40:8,Prv.22:12,Eccl.3:14,Psa.119:86,90,160,Psa.146:6,Matt.5:18,Deut.30:11,Psa.33:11,Psa.12:6-7,1 Chr.16:15,Psa.111:7-8,Psa.100:5,Isa.30:8,Matt.28:19-20) Words he will judge us by in the resurrection. (Jn.12:47-50, 5:38-9)
The Apostles doctrine was at the foundation of the church for the perfecting of the church thus again there would be a finality to this process in their days. (Act.2:42, 1 Cor.12:28, Eph.2:20, 4:11-14, 2 Tim.3:16-7) Inscripturation was in real time (Ac.2:42, 1 Cor.14:37, 2 Pet.3:16, 1 Tim.5:18 w/ Lk.10:7, Ac.13:25, Mt.21:26, w/Jn.1:27, Lk.3:16, 2 Thess.3:14, Rev.1:1-4,11, under the direction of the apostles (2 Pet.3:16, 1 Tim.5:18, Heb.2:3-4, Rev.1:3-4, 11, 3:22, 1 Thes.5:27, Col.4:16) similarly as with the law and the prophets- Deut. 31:24-26; I Sam. 3:19-21,10:25, 1Kin.4:29-30, Dan. 9:2, Isa.8:20, Mal.2:7 w/ Jer.33:20-1 & 2 Ki.22:8) as the gospel was already delivered by Christ and the apostles (Mt.10:40, Lk.10:16, Jn.13:20) and already being defended. (Lk.1:1-4, Heb.1:1-2, 2:3-4, Gal.1:8-12, Jd.3, Rev.1:11,22:13, Heb.12:2)