John Wesley emphasizes the profound joy that comes from a clear conscience in Christ, rooted in faith and love. He explains that true believers rejoice not in worldly wisdom but through the grace of God, which enables them to live in simplicity and godly sincerity. Wesley elaborates on the nature of conscience, asserting that it serves as a moral compass, guiding believers in their actions and thoughts according to God's Word. He highlights that this joy is not dependent on external circumstances but is a deep, spiritual satisfaction that arises from a relationship with God. Ultimately, Wesley encourages Christians to rejoice in their obedience and the transformative power of God's grace in their lives.