“And from Allaah’s grace upon His slave is that He puts him to trial with some calamities, and then grants him the ability to fulfill the task of exercising patience in that. So he (the slave) attains lofty stations which he would have not reached (merely) by way of his deeds.
Indeed, the calamities may become extremely severe upon him, just as He (The Most High) did with Ayyoub (alayhis-sallam); and in Ayyoub’s heart was found the sweetness of the spirit of hope (in Allaah), a desire for His Mercy and His removal of harm. So his ailment became insignificant and he (displayed) vim and energy within himself.
And for this reason, from the grace of Allaah upon the believers is that He places hope for reward in their hearts, so the calamities become insignificant and that which they encounter of difficulties becomes easy in their seeking after the pleasure of Allaah’’