what does the bible say?
Dualism is the belief that reality is divided into two fundamental, opposing principles, such as good and evil, light and darkness, or spirit and matter. In many ancient forms, these principles were treated as rival forces that shaped the world. This way of thinking appeared in several historical systems, including Persian religious thought, Gnostic movements, and philosophies that viewed the physical world as inherently flawed or evil in contrast to the good spiritual realm.
Scripture rejects all forms of dualism, teaching that God alone is sovereign and who created all things (Genesis 1:1ff). Evil does not rival God’s power, nor is it an eternal principle He battles, but is the corruption of what He made (Isaiah 45:5–7; James 1:13–15). Even Satan, the most evil figure in creation, is limited by God and remains under His authority (Job 1:6–12; Luke 4:6).
Because God alone is ultimate, human beings are accountable to Him for their sin. Evil is rebellion within creation that God will judge and decisively end. People are called to repent and trust in Jesus, whom God appointed as Judge and Savior, before that final judgment takes place (Acts 17:24–31; Revelation 20:10).