I also want to add that this is the reason many of our gedollim stressed character refinement. In the words of Rabbi Chaim Vital, “A good character is the primary requisite to fulfilling the 613 mitzvot…Therefore manifesting a faulty character is much more serious than transgressing a command…One must be more heedful of evil emotions than of observing the positive and negative commandments.” (Letter of the Ages, Mesorah)
The goal of our mitzvot are to rectify our character like David Hamelech did.