An-Nur (The Light)
Surah 24 · Verse 39
And (as for) those who do not believe, their deeds will be like a mirage in the desert, which the thirsty person supposes to be water until when he comes to it and finds it to be nothing, and finds Allah with him (to take his account of deeds), so He pays in full to him that which is due to him and Allah is Quick in (settling) the account.
The infidels feel that what they are doing is right. This is a deception like the optical illusion in the desert when the shining sand appears like water to a thirsty man. Likewise his deeds will be of no value and he will be punished for his sins. Infidelity is like intense darkness in the deep sea on a cloudy day when one cannot see even his own hand. These are the people for whom Allah (SWT) has not assigned light i.e. He has not guided them.
