Pascals Wager

In essence it means you should try to do something(break addictions,become a better friend, etc) because youve got nothing to lose if you fail. And much to gain.

Therapist: Let's say you try to quit, if you fail and relapse nothing changes, you can always try again. If you succeed you will be happy again
Patient: So this is what you call a Pascals Wager huh
Therapist: yes, yes it is