Relapse is now seen as the rule rather than the exception in addiction recovery. And it is no longer viewed as a catastrophe but as an opportunity for learning more and better strategies for overcoming urges and for identifying the moods and situations that are likely to be difficult.
What is inappropriate is black-and-white thinking about success that turns a slip-up into a disaster and sees it as a sure sign of defeat. The fact is that it takes time to change all the mental apparatus that supports any particular habit-the memories, the situations that trigger craving, and more. Addiction changes brains, and it takes time to change brains back.