Resolve becomes eroded as addiction progresses and/or life events begin to grind us down and profoundly affect us or when we struggle to find reasons to quit and create a new life. Sometimes, as dark as things seem and as long as the road to wellness is, it becomes a matter of keeping the faith in a better future. This involves a huge amount of belief and a massive leap of faith when negative self-talk is the ingrained behaviour instead of positivity. Effecting real and lasting behavioural change and healthier thought patterns and beliefs takes work and time.
In the end, resolve is all we really have ultimately as no one can fight this battle for us. I do think for many, it must reach the stage where we want recovery more than anything and we have already reached rock bottom.
Addiction becomes a self-fulfilling prophecy when it reaches the stage where the big reward and motivation centres in the brain are damaged and will and resolve are impeded to the point of losing the ability to get up and fight back. We are not just fighting for the innately better life that lies beyond active addiction, but we are also fighting to stop our lives getting far, far worse and losing everything, i.e. jobs, homes, friends, family, health, etc.
I tend to avoid mood altering pharmaceuticals such as anti-depressants, in the absence of my own situation constituting a fundamental depressive illness. It can be hard to differentiate between medicating the fallout of a natural life event or working to build the coping skills without pharmaceutical intervention. I prefer naturally occurring precursors, such as 5-htp, to mood pharmas that create altered physiological processing, especially in the absence of substantive evidence that there is a functional need to "repair" existing faulty processing. Anti-depressants are powerful drugs, not without a longer term chemically altered homeostasis to consider. They should be a last resort when all other options have failed and a real depressive illness is present, or they cause more problems than they assist, particularly in opiate withdrawal scenarios.
I also don't believe that such substances are helpful when utilised as short term interim solutions to a bigger picture, since by the very nature of selecting them to fix a problem outside of their real remit, this already is setting them up to fail in a goal that they are inherently not designed for. We sometimes need to reach deep inside of ourselves instead of relying on a pill to fix the symptomatic issues of a bigger picture. The more of these transient, short term "fixes" we try to deploy, the bigger the repayment in the long term in rebalancing brain chemistry and when mood debt accrues and builds, the cost becomes exponential, until we have no real way back and reach crisis point.
Its hard for me not to have picked up a little wisdom with all the mistakes and wrong turns I have made on my insane journey getting utterly lost and trying to find my way home.