This is a text that should be of great comfort to all teachers and preachers. At the very least that phrase, "...it is hard to explain, since you have become dull of hearing"(12), means at least some of those times when we find texts hard to understand it isn't the teachers fault. It means at least some of the times someone leaves a church saying he or she wasn't being fed they may be saying more about themselves than their church.
This is a great text. We'll study verse 11 this week and 12-14 next week.