Rightly Handling the Word of Truth

​I’m not sure how many people realize there is only one evangelistic book in the New Testament.  That would be the Gospel of John.  The Apostle John is the only New Testament author to state that as his purpose for writing.  John 20:30-31 And truly Jesus did many other signs in the presence of His disciples, which are not written in this book; 31 but these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.  John wrote his Gospel to appeal to unbelievers. 
 
The rest of the N. T. books are written to believers.  Their content deals with living the worthy life of a disciple.  Paul clearly states in the opening of each of his letters he is writing to Believers.  He refers to them as Brethren and Saints.  James, John and Peter do the same.  It would therefore be reasonable to expect these books to deal with matters on life after having obtained salvation.  To impose an evangelistic meaning to them will lead to confusion and faulty doctrine. 
 
For example, how would you explain Romans 5:9 & 10 from an evangelistic perspective? 
Romans 5:9-10 Much more then, having now been justified by His blood, we shall be saved from wrath through Him. 10 For if when we were enemies we were reconciled to God through the death of His Son, much more, having been reconciled, we shall be saved by His life.
 
As stated, these verses are directed to people who have been justified and reconciled to God.  According to Romans 4:1-8 and 5:1-2 that means they have been declared righteous by God, are at peace with God with full access to His grace.  However, they are not yet saved from wrath nor have they been saved by His (Jesus Christ’s) life.  Since he has already defined Justified and reconciled, we have to figure out what Paul meant by the word saved and wrath to make sense of these verses.  To automatically assume saved means deliverance from sin and hell would render both verses as self-contradictory.  And if that’s the case then we need to rethink our understanding of the Bible and inerrancy. 
 
The proper approach is to assume Paul was making factually true statements and then see how he has used these words elsewhere in Romans.  Are they used in a way consistent with his purpose and theme for this letter.  Since these two verses set the theme for the next 3 chapters getting them wrong will likely result in getting wrong as well.