Just saw by the grace of God that it is interesting that Paul mentions Jannes and Jambres withstanding Moses in the same chapter as 2Tim. 3:15-17. These resisted Moses, who authority was not established by the seminary he went to (not faulting such) or political connections, but by his holy character and God’s miraculous attestation, and which in turn affirmed Abraham, which was likewise affirmed.
Moses wrote that down (no, i do not buy the The Documentary Source Hypothesis, http://www.ukapologetics.net/docu.htm) and gave the law and new revelation, establishing a covenant fearfully confirmed, which became the standard for obedience and testing truth claims and thus additional rev. (Is. 8:20, etc.)
In this context of Jannes and Jambres Paul reminds Timothy of who discipled him, which was a man of Scriptural sacrificial holy testimony, and whose manner was to reason out of the Scriptures, (Acts 17:2) such as in Acts 28:23, “persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening,” (Acts 28:23) as well as by the Scriptural attestation of miracles, esp to those who knew not Scripture, (Rm. 15:19) as an able minister of the New Covenant.
Paul then uniquely affirms all Scripture as wholly inspired of God, and instrument of the perfection of the saints (the word for “profitable” is also used for “Godliness” as regards eternal life: 1Tim. 4:8)
Good night, er morning.