Four Hundred Texts on Love (Third Century) 29

59.  When you overcome one of the grosser passions, such as gluttony, unchastity, anger or greed, the thought of self-esteem at once assails you. If you defeat this thought, the thought of pride succeeds it.

In other words, breaking the grip of an attitude or behavior is just the first step. If we do so successfully, we are immediately beset by the wrong sort of self-esteem followed closely by pride in our achievement. And those will undo any gains we originally made.