In his article on Busting Out of Sermon Block Haddon Robinson notes:
God doesn’t give us any points for originality. He gives points for being faithful and clear. To have sitting on our shelves books from the great teachers of the world, people who have spent years of their lives studying a book like Romans, and not use them is to deny the many contributions of Christ’s church. To think that in three hours of exegesis we’re going to match the insights of those who’ve spent years studying a book is a mistake.