The verse in question is:
> "وَالَّيْلِ إِذَا يَغْشَىٰ" (92:1)
> "And by the night when it envelops (all things)."
Then, the verse continues:
> "وَالنَّهَارِ إِذَا تَجَلَّىٰ" (92:2)
> "And by the day when it becomes clear."
Finally, the verse concludes:
> "وَمَا خَلَقَ الذَّكَرَ وَالْأُنْثَىٰ" (92:3)
> "By Him Who created male and female."
The contrast between the "night" and the "day" in the first two verses symbolizes the contrast between Taqwa (consciousness of Allah) and its opposite, La (negation), as explained by scholars. The night symbolizes darkness and ignorance, while the day symbolizes light and knowledge.
Therefore, the absence of Taqwa can be understood as the state of La, or the negation of consciousness of Allah.