God is the Light of the heavens and the earth. The example of His Light is like a niche wherein is a lamp; the lamp is in a crystal, and the crystal shining as if a pearl-like radiant star, lit from the oil of a blessed olive tree that is neither of the east nor of the west. The oil would almost give light of itself though no fire touches it: light upon light. God guides to His Light whom He wills. God strikes parables for people. God has full knowledge of all things.