A.B. Simpson emphasizes the importance of not only conquering but also possessing the spiritual inheritance that God has promised to His people. He draws parallels between the Israelites' delay in claiming their land and the modern Christian's hesitance to fully embrace the fullness of the Gospel and the call to service. Simpson urges believers to actively appropriate their inheritance, engage in spiritual growth, and take on the responsibilities of Christian work, warning against slackness, indifference, and complacency. He challenges the congregation to recognize the urgency of claiming their spiritual territory and to act promptly in obedience to God's call. The sermon serves as a reminder that there remains much land to be possessed in both personal faith and collective Christian service.