Allāh is the Light1 of the heavens and the earth. The example of His light2 is like a niche within which is a lamp;3 the lamp is within glass, the glass as if it were a pearly [white] star lit from [the oil of] a blessed olive tree, neither of the east nor of the west, whose oil would almost glow even if untouched by fire. Light upon light. Allāh guides to His light whom He wills. And Allāh presents examples for the people, and Allāh is Knowing of all things.
Translation: Saheeh International (English)
1 i.e., the source and bestower of light and enlightenment.
2 His guidance in the heart of a believing servant.
3 Literally, "a burning wick," which is the essence of a lamp.
Allah is the Light of the heavens and the earth, and the Guide of all those in them. The example of His light in the heart of a believer is like a closed niche which contains a lantern. The lantern is in a bright glass, as though it is a shining star like a pearl. The lantern is lit by the oil of a blessed tree, which is the olive tree. Nothing conceals the tree from the sun, neither in the morning nor in the evening. The oil is about to glow, due to its purity, even though a fire has not touched it; imagine how it will be when it touches it? The light of the lantern is on the light of the glass. Likewise is the heart of the believer when the light of guidance shines in it. Allah enables whomever He wishes amongst His servants to follow the Qur’ān. And Allah makes things clear through their likenesses, by giving examples. And Allah is Knowing of everything, nothing being hidden from Him.