This sermon explains that Jesus said He "must be about His Father's business," meaning He was completely devoted to doing God's work of saving people, and Christians should have the same total dedication to serving God in everything they do. Spurgeon urges believers to consecrate their entire lives—including their jobs, money, talents, and time—to God's service, not just religious activities, because true Christianity means giving everything to Christ without holding anything back. He encourages Christians that whether they're working in a shop, caring for family, or lying sick in bed, they can serve God faithfully in their situation, and promises that wholehearted service to God brings happiness now and eternal rewards in heaven.

A sermon delivered by Charles Spurgeon on March 15, 1857.