Allah is the light of the heavens and the earth; His light is like a niche in which there is a lamp, the lamp is in a glass, (and) the glass is as it were a brightly shining star, lit from a blessed olive-tree, neither eastern nor western, the oil whereof almost gives light though fire touch it not – light upon light – Allah guides to His light whom He pleases, and Allah sets forth parables for men, and Allah is Cognizant of all things. 24:35