"... Indeed, Allah will not change the condition of a people until they change what is in themselves..."
QS Ar-Ra`d (The Thunder) : 11

"And [remember] when your Lord proclaimed, 'If you are grateful, I will surely increase you [in favor]; but if you deny, indeed, My punishment is severe.' "
QS 'Ibrāhīm (Abrahim) : 7

"So which of the favors of your Lord would you deny?"
QS Ar-Raĥmān (The Beneficent) : 30

"For indeed, with hardship [will be] ease.Indeed, with hardship [will be] ease."
QS Ash-Sharĥ (The Relief) : 5-6

"The best of people are those that bring most benefit to the rest of mankind."
(HR. Ahmad, Thabrani, Daruqutni)