In this sermon on Romans 12:11­–12 titled “Serving the Lord,” Dr. Martyn Lloyd-Jones preaches about the importance of serving the Lord with zeal. The Christian may be tempted to do things half-heartedly as they go from task to task. Dr. Lloyd-Jones preaches that this approach is second to demon possession in that the Christian has allowed the devil to influence their actions. Slothfulness, he expresses, can manifest itself in doing something half-heartedly. This lazy form of action is one way in which the devil corrupts God’s good creation. Similar to the body and mind, exercise of the Spirit is what promotes its health within the believer. The Christian must continually fan the flames of the Spirit within them. Before long, the sluggish Christian can become the diseased Christian who falls into sin easily and becomes entangled by it. Dr. Lloyd-Jones also preaches that when the Christian feels lethargic or sluggish, they must meditate on, read, and study the actions of God in His people. God will bring to fruition the seeds sown by the Christian. God’s people must be sure to keep fervent in spirit, which literally means that they must be “at the boiling point” in their hearts and in their passion for the Lord.