If I emphasize Paul, should I ignore the Gospels or the Old Testament?
No. Stressing Paul never requires setting aside the Gospels or the Old Testament. The whole Bible is taken from cover to cover, yet proper understanding begins with certain basics. Scripture itself confirms this pattern: the righteousness of God is manifested by the Law and the Prophets, meaning the Old Testament, and Paul's foundation remains essential.
Les explains that when he stresses Paul, he will never say to ignore the Gospels or to ignore the Old Testament. The whole book is taken from cover to cover, but you have to begin with some basics. He points to the verse where the righteousness of God without the law is manifested—put in the spotlight—by the Law and the Prophets, which is the Old Testament. So the Old Testament is not discarded; it bears witness. He also cites 1 Corinthians chapter 3, where Paul says that, according to the grace of God given to him as a wise master builder, he laid the foundation. Believers are God's husbandry and God's building. Les notes that if what Paul writes were not true, then Paul would be the biggest liar and imposter, but he is not. Thus emphasizing Paul's unique revelation does not cancel the Gospels or the Old Testament; it establishes a foundation while the whole Scripture remains taken from cover to cover.