Module 5 explores the Holy Spirit, angels, demons, Satan, and the unseen world in Christianity. It begins by explaining that spiritual language can refer to invisible influences, patterns, dispositions, divine activity, or supernatural beings, then traces the idea of the Holy Spirit from the Hebrew Bible into Christianity. The module shows that Christians understand the Holy Spirit in different ways, but generally agree that God’s Spirit draws people toward truth, repentance, holiness, transformation, and faithful living. It also examines baptism of the Holy Spirit, spiritual gifts, and the fruits of the Spirit, showing that Christians disagree about dramatic spiritual experiences and miraculous gifts, but broadly agree that lasting spiritual maturity is shown most clearly in character such as love, faithfulness, wisdom, humility, and self-control.