And when adversity touches man, he calls upon his Lord, turning to Him [alone]; then when He bestows on him a favor from Himself, he forgets Him whom he called upon before, and he attributes to Allāh equals to mislead [people] from His way. Say, "Enjoy your disbelief for a little; indeed, you are of the companions of the Fire."
("O My servants, if the first and the last of you, men and Jinn alike, were all to be as evil as the most evil man among you, that would not diminish from My sovereignty in the least.")
In the opening verse (7), it was said: إِن تَكْفُرُوا فَإِنَّ اللَّـهَ غَنِيٌّ عَنكُمْ (If you disbelieve, then, Allah does not need you at all,) that is, neither does your faith bring any benefit to Allah Ta’ ala, nor does your disbelief or ingratitude, any loss. According to a Hadith in Sahih of Muslim, Allah Ta’ ala said: "0 My servants, even if the first and the last among you and the humans and the Jinns, all of them, were to fall in sin and disobedience, it does not affect My power and authority in the least." (Ibn Kathir)
Next it was said: لَا يَرْضَىٰ لِعِبَادِهِ الْكُفْرَ (however He does not like for His servants to be disbelievers,) The word: رِضاء (rida) means love, liking, pleasure, or to intend to do something without objection. Its antonym: سَخَط (sakhat) means to detest something or take it to be objectionable - even if it is coupled with intention.
Every man passes through times when he finds himself utterly helpless. At this juncture, he forgets everything and starts appealing to God. In this way, in times of helplessness, every man comes to know that there is nobody worth worshipping except the one and only God. But, as soon as he is out of trouble, he resorts to his earlier ways. Man only becomes more arrogant and starts attributing his relief from affliction to beings other than God. For Some it becomes the miracle of cause and effect, while for others it is a feat of supposed gods. If a man keeps quiet after making a mistake, it involves the misguidance of only one man. But, if he starts giving false explanations in order to justify his mistakes, he becomes one who misleads others.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.