Where God is explaining something, we need to help people to understand. Where God is warning us, we need to help people feel the urgency and weight of that. Where God is wooing us, we need to help people feel the pull of his love. Where God is correcting us, we need to show people that they are going the wrong way and to help them get back on track. Where God is comforting his people, we want people to feel the security and warmth of his comfort. And that, in a nutshell, is expository preaching.
