Allah is the Light of the heavens and the earth. The example of His light is that of a niche, in which there is a lamp; the lamp is in a glass – the glass looks like a brilliant star – it is lit by (the oil of) a blessed tree, the olive, which is neither eastern, nor western. Its oil is about to emit light even though the fire has not touched it – (it is) light upon light. Allah guides to His light whomsoever He wills; Allah describes examples for the people, and Allah knows everything well.