Is there metaphor in the Qur'an, and what is the validity of the claim that darkness and light are metaphors for disbelief and faith?

Question:
He says: Honorable Shaykh, may Allah grant you success, is there metaphor in the Qur'an? And if there is not, what is the validity of the claim that darkness and light are metaphors for disbelief and faith?

Answer:
My brother, darkness is of two types: physical darkness and spiritual darkness. Who told you that darkness is exclusively physical? And light is likewise: physical light, like the light of lamps now, and spiritual light, which is the light of faith. So these are shared terms with meanings. They have shared meanings. But these people do not know the Arabic language, which brought forth metaphor, metaphorical usage, and such things. Most of them are non-Arabs who do not know the Arabic language, and so they restricted it to certain things and said that whatever contradicts it is metaphor. Who said that? Yes.