A.B. Simpson emphasizes the urgency of reaching out to those who have become indifferent to the gospel, as illustrated in the parable of the great supper in Luke 14. He notes that many in Christian countries are increasingly offering excuses to avoid the invitation to Christ, prompting the Lord to seek those in the highways and hedges. Simpson highlights the dual movement of taking the gospel to both the neglected classes at home and abroad, urging believers to actively compel others to come to the feast of salvation. The sermon calls for a renewed commitment to evangelism and outreach in a world that is growing indifferent to the message of Christ.