Why is Les concerned about the preaching and teaching people are receiving today?
The concern is that people across the land are not receiving in-depth preaching or teaching from the Word. Much of it is shallow, and even Sunday School material, though good, remains shallow. It does not enter the deep things, while Paul admonishes believers to let the Holy Spirit take them into the deep things of God's Word.
Les explains that his concern comes from what he hears from people all across the land: they are not getting in-depth preaching or teaching from the Word. He says it is all so shallow, and he has felt that way for years. Too much Sunday School material, as good as it may be, is still so shallow and does not get into the deep things. Paul is admonishing that we have to let the Holy Spirit take us into the deep things of God's Word.