Did Paul consider himself to be authoring scripture?

Paul did consider a NT during his time of writing. In I Timothy 5:18, Paul quotes both OT Scripture and Luke(NT) and calls them both Scripture.

I Timothy 5:18
For the Scripture says, “You shall not muzzle an ox when it treads out the grain,” and, “The laborer deserves his wages.”​

"You shall not muzzle..." is from Deut 25:4. "The Laborer..." is from Luke 10:7. Paul recognized the gospel of Luke as Scripture.

As far as Paul knowing he is Writing Scripture, I'll look at see. I believe there is somewhere where Paul says he is getting his writings from the Lord. I'll check on it.

 

2Peter 3.16
15 And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you;
16 As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.

At least Peter knew Paul was writing scripture. So why wouldn't Paul

 

My friend, I believe all the apostles knew they were to complete the Biblical canon. It was predicted in Isaiah 8:16-20. Isaiah 8:18 was quoted by the writer in Hebrews 2:12 directly applied to the apostes (Heb. 2:3-4). Jesus explicitly told them in the upper room discourse that the Holy Spirit would give them infallible memories of Christ and what he said and that they would be led "into ALL truth" and that through their words others would come to believe in Christ (Jn. 17:20). John explicitly stated that what the apostles said or wrote was the standard of truth (I Jn. 4:5-6). Paul claimed what he said and wrote was the Word of God (1 Thes. 2:13). Peter claimed that Pauls writings were as "other scriptures" (2 Pet. 3:15-16).

John the last living apostle claimed that Revelation was the "testimony" of Jesus in keeping with Isaiah 8:16 "Bind up the testimony, seal the law among my disciples." and John placed such a seal in Revelation 22:18-19.

The Bible reads as a completed book. What is begun in Genesis is finished in Revelation

1. In the beginning God created the heavens and the earth - Genesis
And I saw a new heaven and a new earth - Revelation

2. The gathering together of the waters he called seas - Genesis
And the Sea is no more - Revelation

3. The darkness he called night -Genesis
There will be no night there - Revelation

4. God made two great lights (sun and moon) - Genesis
The city had no need of the Sun or the moon - Revelation

5. In the day you eat thereof you shall surely die - Genesis
Death shall be no more - Revelation

6. I will greatly multiply your pain - Genesis
Neither shall there be pain any more - Revelation

7. Satan appears as the deceiver of mankind - Genesis
Satan disappears forever - Revelation

8. They were driven from the tree of life - Genesis
The tree of life reappears - Revelation

9. They were driven from God's presence - Genesis
They shall see His face - Revelation

10. Genesis anticipates Christs first coming - Genesis 3:15
Revelation anticipates Christ's second coming

11. Man's primeval home was by a river - Genesis
Man's eternal home is by a river - Revelation

Isaiah 8:14-15 is specifically quoted in the New Testament and applied to Christ just as Isaiah 8:18 is specifically quoted in the New Testament and applied to the apostles of Christ. Therefore when Isaiah says "among my disciples" in verse 16 this is ultimately fulfilled in the finishing of the Biblical canon directly by or underneath the direction of the apostles. They knew what they were doing.

 

Would it matter? God's word is still God's word, inerrant, inspired, infallible, whether they knew it was such or not.

 

Yes sir, I believe it does mattter or those statements would not be found in the Scriptures at all if it did not matter.

Yes sir, I believe it does matter as it is a descisive issue between non-cessationism and cessationism in regard to finsihed Biblical revelation.