فَلَوْلا إِذْ جَاءهُمْ بَأْسُنَا تَضَرَّعُواْ

When Our torment reached them, why then did they not believe with humility,

Meaning:Why do they not believe and humble themselves before Us when We test them with disaster!'
 
وَلَـكِن قَسَتْ قُلُوبُهُمْ

But their hearts became hardened,

for their hearts are not soft or humble,
 
وَزَيَّنَ لَهُمُ الشَّيْطَانُ مَا كَانُواْ يَعْمَلُونَ
 
 

and <b>Shaytan</b> made fair-seeming to them that which they used to do.

That is, <b>Shirk</b>, defiance and rebellion