Allah is The Light of the heavens and the earth; the similitude of His Light is as a niche wherein is a lamp, the lamp in a glass, the glass as it were a glittering planet-kindled from a Blessed Tree, an olive that is neither eastern nor western, whose oil would almost illuminate, even if no fire touched it, Light upon Light; Allah guides to His Light whomever He decides, and Allah strikes similitudes for mankind, and Allah is Ever-Knowing of everything.