Re: God revealed that Israel would be his chosen

16 All scripture is inspired by God and is useful for teaching, for reproof, for correction, and for training in righteousness, 17 so that everyone who belongs to God may be proficient, equipped for every good work.

2 Timothy 3

 13 When you come, bring the cloak that I left with Carpus at Troas, also the books, and above all the parchments. 

2 Timothy 4

If it's good enough for Paul, it's good enough for me. That doesn't in any way negate any of those other admirable qualities to which all Christians aspire. They simply inform our journey.