I'll try to keep my reflection short: When man separates himself from humanity... he is lost. We need the presence of the other to remain sane and in each other is our only communion with God. For comprehending God is the only understanding one could hope to ever achieve in life -- everything else is irrelevant. After 3 long years of isolation, Sam Bell's emotional and intellectual stability breaks down with spats of anger and sorrow; however, solitude and loneliness much akin to that represented in this film is entirely plausible within the planet's most condense cities.
With the advantage of hindsight, I must remember to make the most out of my interactions with people along my journey. A simple dinner discussion with a family in Salina, Kansas, or an interaction with a gas station teller in Pinedale, Wyoming, or a leisurely ride alongside my good friend Jonathan through Kentucky... I must make the most of these interactions. They will keep me grounded. They will keep me sane.