Where do we get the fundamental truths for salvation and the Christian walk?
The fundamental truths for salvation, the Christian walk, and the operation of the local church are garnered from the Pauline letters, especially Romans. Paul is the designated Apostle of the Gentiles for this age of grace, the Church Age, so these letters are the source for such fundamental truths.
Les teaches that during this age of grace, called the Church Age, Paul is the designated Apostle of the Gentiles. Therefore, the fundamental truths for salvation, the Christian walk, and the operation of the local church must come from Paul's letters. He clarifies that this does not make the rest of the Bible inappropriate, since Paul writes that all Scripture is profitable, inspired of God, and profitable for reproof and instruction in righteousness. Romans especially contains much that is fundamental for Gentiles.