That to tendency to isolate our sermons to one tiny piece of biblical text is a major problem, and it also explains why so much evangelical preaching is moralistic. It is easy to pick out a familiar story, make a few points from it about what people should and should not do, and then be done with it. But that kind of preaching will leave a church weak and starving, because the Christians who sit under it never find themselves in the big story of God’s work in the world. If we as preachers want to see our people growing to maturity in Christ, we must give them more than a diet of wee little morality sermons. We must place every text we preach firmly within the grand, sweeping story of the Bible.He is Not Silent, pp. 89-90, by Al Mohler
Christians are starving. We need to hear what each text of scripture says about the struggle between Satan and the seed of the woman, and how Christ has won the victory. Moral lessons don’t feed. Only Christ is the bread that feeds us.