Why should we pay attention when Paul says he received the message he preaches?

Les teaches that Paul was adamant he did not receive his Gospel from the earthly ministry of Christ. He did not go back to Jerusalem to check with the Twelve; instead, he had private seminary training with the Ascended Lord in the desert. From that experience came the doctrines of grace. Les maintains our Gospel must come primarily from Paul's writings because he reveals things given after Christ's crucifixion, resurrection, and ascension, from where He is now seated at the Father's right hand. Paul delivered what he received: that Christ died for our sins, was buried, and rose again the third day according to the Scriptures. This was prophesied in the Old Testament but not understood until revealed. Les uses the analogy of secular education: you cannot go into higher mathematics without basic arithmetic, but you do not stay in elementary levels; you move on, building on the basics. Likewise, in Scripture we move on to further revelations. So when Paul says he received this message, we must sit up and take notice.