2 Timothy 3:16 says all Scripture is given by inspiration of God. So EVERY word of God would include Scripture that is inspired by God. To say so otherwise is to deny the Scripture or the Bible is God's words. In fact, a person cannot even have faith without the Bible. For faith comes by hearing, and hearing the Word of God (Romans 10:17). You would not know about Jesus, or the gospel if it was not for the Bible.
Yes. The important thing to take into account is the context, both within the chapter, within the book within the moment in history and within the culture from which it comes. Timothy was written before the NT was compiled. Scripture at that time would have been the OT. And "scripture" literally means "something written down". So, it was written down copies of the OT. and yes, it IS good for everything 2 Timothy 3 says.
Regarding "scripture inspired by God", I would ask the question, keeping in mind, "scripture" means something written down, what things that are written down are written by people inspired by God? Any 20th century writings? How about C. S. Lewis? How about any 19th, or 18th, or even 21st century writers? Frankly, I think it ALL is "profitable for teaching, for reproof, for correction, and for training in righteousness".
For me, it is really that simple. I think Bibles are very important. I think a Christian life lived without one is missing an important aspect of the Christian life. And I think the bible - both testaments - CONTAINS the word of God. It has both divine and human content.
Two examples of human content:
First (bold mine), 1 Corinthians 7:12 - "To the rest I say (
I, not the Lord) that if any brother has a wife who is an unbeliever, and she consents to live with him, he should not divorce her."
This is not the word of God because, well, it clearly says it isn't.
Second, 1 Cor 11:15-16 - "Does not nature itself teach you that if a man wears long hair it is a disgrace for him, but if a woman has long hair, it is her glory? For her hair is given to her for a covering."
A lot of people have a hard time with this verse because, frankly, it doesn't make a lot of sense and sounds kinda cultural, but when you understand that Paul was well read and Hippocrates had a perspective on this that Paul was parroting, it suddenly makes complete sense. So, is it inspired by God, or by
Hippocrates?
IMO, key to our relationship with our creator in the spiritual realm is prayer, and study of the words of other men seeking a relationship with our creator in the spiritual realm. That includes, as a first source, the bible, followed by the writings (scripture) of men inspired by God throughout the centuries. And it is all profitable for teaching, reproof, correction and for training in righteousness." And if one has a solid relationship with our Creator, it will become apparent which ones are true, and which ones are nonsense. Ultimately, the holy spirit is our guide, not anything written by any human being that claims to be inspired.
If the bible was, in fact, the "word of God", we'd only need one Gospel. That's how the Quoran and Book of Mormon work. One human source, claiming to be "inspired by God".