This sermon explores the spiritual practice of service as the final topic in a series on spiritual disciplines. It emphasizes that service is not about earning favor with God but about deepening our relationship with Him and reflecting His love to the world. The speaker highlights Jesus' example of servanthood, contrasts it with worldly notions of greatness, and challenges listeners to cultivate humility and notice the needs of others. The sermon also addresses the barriers to service, particularly pride, and offers practical ways to incorporate service into daily life.