G. Campbell Morgan emphasizes the solemnity of doing God's work, using the story of Nadab and Abihu to illustrate the importance of loyalty to God in our service methods. He urges the Church to regularly reassess its organizations and practices to ensure they align with divine principles, warning against those that may drain spiritual vitality without contributing to God's purpose. Morgan stresses that true service must be motivated by the Holy Spirit rather than personal ambition or fame, highlighting the need for constant submission to God's will in all Christian endeavors.