quo debeo agere satis sum
for what I have to do, I am enough.
I'd have to agree that 'Rock bottom' is not a destination. It's more of a state of mind... i.e. Unless someone (an addict) reaches a point that is sufficiently bad to convince them that they can't go on with life, as they are currently living it, then they are compelled to go on as they have. '...we get worse, never better.' It's weird in Australia, where counselors talk harm minimization... another living hell for those of us who need the good oil! But I guess the author was just trying to say that prison aint nice.