Are Paul's writings the words of Jesus?
Yes, Paul's writings are the words of Jesus, because Paul received everything he wrote from the Lord in glory. They remain Jesus' words, now post-resurrection and after the finished work of the cross, and are where the meat of our doctrine lies.
Les explains that everything Jesus said in His earthly ministry was before the cross, before He died, before His blood was shed, so nothing is mooted of that. When you go by what Jesus said in His earthly ministry, you're going by that which is before the cross. But Paul makes it plain that everything he writes he received from the Lord in glory. So it's still the words of Jesus, only now in the time most appropriate: post-resurrection, after He finished the work of the cross. Les stands by his guns that we must adhere to Paul's writings, because this is where the meat of our doctrine really lies.