From the greatest of catastrophes for a man is that he knows his own shortcomings, but is not concerned, nor does he grieve over them.
A sincere repentance to Allaah is from the greatest [acts with] which one can draw near to Allaah, particularly during these virtuous days [of Dhul-Hijjah]; O Allaah forgive us, & immerse us in your Mercy.
Indeed one will not find pleasure of food when ill, so how will he find pleasure in worship whilst sinning?
The concern & attention the servant [of Allaah] has for his sins, motivates [him] to abandon them. And his remorse over them is the key to repentance. And, the servant [of Allaah] maintains [this] concern & attention for the sins which he is afflicted by until [his concern & attention] becomes more beneficial for him than some of his good deeds.