The document defines the spiritual world as the extra-physical reality where spirits interact. It describes the spiritual world as having two types - the world of light belonging to God and his angels, and the world of darkness formed by Satan and demons. The spiritual world can influence the physical world, either positively when one's spirit is transformed by God's word, or negatively when one rejects God and is dominated by darkness. The conclusion encourages letting the world of light influence one's life by following God's word as a guide.