أَن جاءَهُ الأَعمىٰ

Because the blind man approached him.

وَما يُدريكَ لَعَلَّهُ يَزَّكّىٰ

And how could you possibly know? Maybe he would purify himself.

أَو يَذَّكَّرُ فَتَنفَعَهُ الذِّكرىٰ

Or he might be reminded, and the reminder would benefit him.

أَمّا مَنِ استَغنىٰ

Yet, as for the one who is indifferent.

فَأَنتَ لَهُ تَصَدّىٰ

You devoted your full attention.