An English dictionary defines a mirage as...

An English dictionary defines a mirage as: 'It is caused by the refraction of light rays from the object through layers of air having different densities as the result of unequal temperature distribution.' [^1] Imam Ali (a.s.) was asked about how Allah reckons all people together.

There covers him a wave, above which is another wave, above which is a cloud; (with layers of) darkness one over the other. When he holds out his hand, he can hardly see it. And for whomever Allah does not appoint light, for him there is no light." Commentary: Each deed that a believer does is light and each deed that a disbeliever does is darkness. Instead of opening way for them, disbelievers' deeds mislead them more and it will be veil upon veil.

Therefore, in this noble verse the Qur'an says: "Or (the Unbelievers' deeds) is like utter darkness in a vast, abysmal sea. There covers him a wave, above which is another wave, above which is a cloud; (with layers of) darkness one over the other. When he holds out his hand, he can hardly see it. ..." Yes, the true light in men's life is only the light of faith, and life will be dark and obscure without it, but this light of faith comes only from Allah. The verse continues saying: "...

And for whomever Allah does not appoint light, for him there is no light." To understand this example fully, it is first necessary to pay attention to the meaning of the Arabic word /lujjiy/. It means: 'a vast and very deep sea', and, in fact, it is derived from the Arabic word /lijaj/ which means: 'to go after or insist on a job, (usually bad ones)'. Then it has been applied to the succession of waves of the sea and to their standing behind each other.

Since if a sea is deeper and vaster, its waves are more, this word is applied to the deep and vast seas.