Allah is the Light[26] of the heavens and earth. The likeness of His light[27] is that of a niche in which is a lamp; the lamp is in a glass; the glass is like a shining star – it is lit by [the oil of] a blessed olive tree, which is neither of the east nor of the west[28]. Its oil would almost glow, even without being touched by fire. Light upon light; Allah guides to His light whom He wills. Allah sets forth comparisons for people, and Allah is All-Knowing of everything.
[26] i.e., the source and Bestower of light. [27] The light of guidance in the heart of the believer. [28] As it is located in a central place, so it is hit by sunrays all day long; thus, its oil is of premium quality.