I was reminded of some of my own learnings watching the movie WILD starring Reese Witherspoon and based on Cheryl Strayed's book of her journey along the Pacific Crest Trail.
As a fellow thru-hiker (even though I've only completed one at this stage, taking 50 days along the AAWT) I was reminded that everyone has problems and it doesn't matter why you started walking in the first place. There is a monotony involved in the daily grind of thru-hiking but there is also a confidence that grows out of this. There is depth of the psyche that is entered and plunged into no matter how hard you try not to.
As a result you're not the same once you've completed one and you can't take it back. You can't take back what you know about yourself and what you are capable of. That knowing is so strong it can make you or break you when trying to settle back into 'post-trail' life.
I encourage anyone to not resist the call of the wild that lies waiting dormant in the depths of their belly. The wild, whether it is nature or the beast within, has a way of catching up with us all in the end trying to find synthesis and a way of being.