I'm with a couple of the other commentators here.... This go around, I have had great success with my sobriety, and have taken huge leaps in terms of personal growth. Can a person do everything right and still relapse months or years down the line? Do I have to answer that question? No, I do not.
I think what's happening on the inside is far more important than what is happening on the outside. Maybe one of the keys to failure is that external change is our main focus, rather than internal growth.