Horatius Bonar challenges the notion of 'comfortable Christianity,' urging believers to reflect on their spiritual complacency and self-indulgence. He questions whether modern Christians are truly living as 'living sacrifices' to God, as exemplified by the apostles, or if they are merely seeking their own comfort while neglecting the needs of the world. Bonar calls for a wake-up call to action, emphasizing the urgency of serving others and dedicating oneself to God's work, rather than indulging in worldly pleasures. He warns that while Christians remain idle, souls are perishing, and the return of Christ is imminent. The sermon serves as a powerful reminder to prioritize spiritual commitment over personal comfort.