The human body has limitations; the human spirit is boundless. Author: Dean Karnazes Copy Quote More from Dean Karnazes “Somewhere along the line we seem to have confused comfort with happiness.” “Endurance is one of the most difficult disciplines, but it is the one who endur…” “Most dreams die a slow death. They're conceived in a moment of passion, with th…” “Life is a series of obstacles and setbacks; living is overcoming them.”