One of the most beautiful hadith that I have read in awhile.
Reference: Al-Kafi, Book of Belief 23-26 (WOFIS:Tehran), pg. 133.
The Messenger of Allãh (saw) said: ‘Allãh, to Whom belong Might and Majesty, said:
“Among my faithful servants, there are some servants whose religious affairs are not amended except by wealth, amplitude and healthy body, so I test them by wealth, amplitude and healthy body to amend their religious affairs. Also, there are among my faithful servants some servants whose religious affairs is not amended except by poverty, misery and illness in their bodies, so I test them by poverty, misery and illness to amend their religious affairs. So, I know better what amends the religious affairs of my faithful servants.
And there are among my faithful servants who endeavour to worship me, they wake up from the sweet sleep of their comfortable beds, to spend the night in prayer and trouble themselves in my worship. Then I cause him sleep for one night or two because of the insight I have on him and preservation on him. So, he sleeps till morning, and then he wakes up while he is hateful and blaming himself, [for missing the night prayer]. In case, if I leave to his discretion to worship me as he likes, pride will over take him, and that pride will lead him to temptation with regard to his deeds (a‘mãl), which will perish his religion due to his pride and his self-satisfaction until he believes that he has surpassed all worshippers and exceeded in his worship the limit of negligence. Then he will keep away from me while he thinks that he is coming close to me.
So, those who do good deeds to receive My reward should not rely on their deeds because as much as they endeavour and trouble themselves and dedicate their lifetime to My worship, they are still neglectful, immature in their worship to attain the depth of My worship in what they are seeking from Me of my generosity and bliss in My Gardens, high and exalted ranks in My proximity. Rather, on My Mercy they should trust and on My Bounty they should rejoice. Thus, with good opinion, they should have confidence on Me since my Mercy will overtake them; and from Me My pleasure will reach them, and My forgiveness will dress them with My pardon. Verily, I am Allãh, the Beneficent, the Merciful; and by that I am called so.”