George Fox emphasizes the call for believers to be messengers of God's covenant, urging them to preach the gospel with humility and power. He encourages them to remain steadfast on the mountains of faith, proclaiming peace and liberty to the captives while being guided by the light of Christ. Fox warns against engaging with the adversary and stresses the importance of recognizing the divine witness in every person. He highlights the need for believers to dwell in God's power and wisdom to overcome opposition and fulfill their mission. Ultimately, he reassures that Christ, who brings victory, remains the same yesterday, today, and forever.