41:51
وَإِذَآ أَنْعَمْنَا عَلَى ٱلْإِنسَٰنِ أَعْرَضَ وَنَـَٔا بِجَانِبِهِۦ وَإِذَا مَسَّهُ ٱلشَّرُّ فَذُو دُعَآءٍ عَرِيضٍۢ
And when We bestow favor upon man, he turns away and distances himself; but when evil touches him, then he is full of extensive supplication.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Man is fickle when Ease comes to Him after Difficulty
Allah tells us that man never gets bored of asking his Lord for good things, such as wealth, physical health, etc., but if evil touches him -- i.e., trials and difficulties or poverty --
فَيَئُوسٌ قَنُوطٌ
(then he gives up all hope and is lost in despair.), i.e., he thinks that he will never experience anything good again.
وَلَئِنْ أَذَقْنَـهُ رَحْمَةً مِّنَّا مِن بَعْدِ ضَرَّآءَ مَسَّتْهُ لَيَقُولَنَّ هَـذَا لِى
(And truly, if We give him a taste of mercy from Us, after some adversity has touched him, he is sure to say: "This is due to my (merit)...") means, if something good happens to him or some provision comes to him after a period of difficulty, he says, `this is because of me, because I deserve this from my Lord.'