John Wesley emphasizes the transformative power of the Spirit of adoption in contrast to the spirit of bondage and fear. He explains that true children of God, through faith, receive the Spirit that allows them to call God 'Abba, Father,' moving from a state of fear to one of love and acceptance. Wesley warns that many in the Christian world remain in a state of spiritual ignorance, lacking both the fear and love of God, and encourages believers to examine their spiritual state. He outlines the three states of man: the natural man, the one under the law, and the one under grace, highlighting the importance of moving from fear to love through the grace of God. Ultimately, he calls for a deeper relationship with God, characterized by love and the assurance of salvation.