Why does Les think his teaching helps common people understand the Bible?
Because he identifies as an average Sunday school teacher without deep theological training, he believes the Lord gave him a teaching gift that presents Scripture plainly in a way common folk can understand, which he says makes the teaching work.
Les explains that he wants people to know he is not a degreed, educated theologian. He says he is more like the average Sunday school teacher and does not claim any deep theological background. Yet he feels the Lord has given him the gift of teaching the Bible in a way that common folk can understand. He says that is what makes his teaching work, and he appreciates that his audience addresses him simply as “dear Les” rather than trying to make him something more than he is.