Man (the disbeliever) does not get tired of asking good (things from Allah), but if an evil touches him, then he gives up all hope and is lost in despair.

And truly, if We give him a taste of mercy from us, after some adversity (severe poverty or disease, etc.) has touched him, he is sure to say: "This is for me (due to my merit), I think not that the Hour will be established. But if I am brought back to my Lord, Surely, there will be for me the best (wealth, etc.) with Him. Then, We verily, will show to the disbelievers what they have done and We shall make them taste a severe torment.

And when We show favour to man, he withdraws and turns away, but when evil touches him, then he has recourse to long supplications.