أَلْهَاكُمُ التَّكَاثُرُ
Rivalry for increase distracted you. (التكاثر: 1)
ثُمَّ لَتُسْأَلُنَّ يَوْمَئِذٍ عَنِ النَّعِيمِ
Then you will surely be asked about blessings. (التكاثر: 8)
The surah develops through five broad movements: (1) naming the distraction, (2) tracing it to the grave, (3) rebuking it with kallā, (4) warning of certain knowledge and sight, and (5) announcing inquiry about blessings. These distinct assertions form one coherent admonitory purpose.
The analysis must therefore exceed isolated terminology. The contribution of thumma, the reinforcement of la-tarawunna, and the breadth of ʿani al-naʿīm operate together. Assigning the entire rhetorical effect to any one particle would flatten the passage.