You're the one that quite mixed up...
2Ti 2:15 Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
That's the instruction in the Book...One may not become a very good doctor by just reading the medical book, but by here's what you get by reading God's book:
2Ti 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 2Ti 3:17 That the man of God may be perfect, throughly furnished unto all good works.
You stepped in it again...
One thing is certain, if I were looking Christians I wouldn’t look here.
Even if your reading of the passage werent eisegetical, where are your other two witnesses?