When you have an hour to be fed, listen to Kevin DeYoung at Parkside Church's Basics Conference (pastor Allistair Begg). He speaks on the perspicuity of Scripture. Even if you never use that word, you have to know what it means, and your church must feel this word by the way you revere and teach and put confidence in the Scriptures. Listen to it and find other sermons from that conference here.