View that all observable phenomena are dependent on but distinct from one supreme being. The view usually entails the idea that God is beyond human comprehension, perfect and self-sustained, but also peculiarly involved in the world and its events. Theists seek support for their view in rational argument and appeals to experience. Arguments for God's existence are of four principal types: cosmological, ontological, teleological, or moral. A central issue for theism is reconciling God, usually understood as omnipotent and perfect, with the existence of evil. See alsoagnosticism, atheism, Deism, monotheism, polytheism, theodicy.