2 Timothy 3:16
All Scripture -- Every Scripture ..= Many scholars like Lenski say there is no difference in these renderings (translations). Most translations follow "All Scripture."
All Scripture would include the NT sacred writings as well as the Old Testament. As Paul has already referred to the OT in vs. 15, he now deliberately includes the Sacred Writings of the New Covenant as well.
Inspired of God -- God breathed. "God-breathed, breathed into by God, inspired. The rabbinical teaching was that the Spirit of God rested on and in the prophets and spoke through them so that their words did not come from themselves, but from the mouth of God and they spoke and wrote in the Holy Spirit. The early church was in entire agreement with this view." (Rienecker, LKGNT)
INSPIRATION - 2 Timothy 3:16, 2 Peter 1:21, 1 Corinthians 14:37, 1 Thessalonians 2:13, Galatians 1:11-12, Matthew 17:5, Luke 1:68-70,
Doctrine = teaching; We must teach scripture.
Reproof = rebuke- for the purpose of “refutation” of a false statement or argument. PPC
"Only the Christian morality is the true ethic governing human behavior. The pre-Christian Gentiles forsook God, and the result was the near-universal debauchery of the human race. There can be no doubt that forsaking the NT ethics on such things as adultery, homosexuality, drunkenness, etc., if persisted in, will have the same final result." Coffman.
Correction = setting a person on a straight course.
Instruction = training, instructing believers in God’s ways.
Doctrine = tells us what is right.
Reproof = tells us what is not right
Correction = tell how to get right
Instruction = tells how to stay right.
AUTHORITY OF THE BIBLE
2 Timothy 3:16,
Deuteronomy 18:20,
Revelation 22:18-19,
Deuteronomy 4:2,
Numbers 24:12-13,
Luke 16:15,
Proverbs 14:12.
The final revelation - Galatians 1:8-9,
John 16:13,
2 Peter 1:3.