I really resonated with the idea of knowing who your opponent is. There are often times where things get tough and I essentially become my own opponent; this can be detrimental to the success of the project, goal, or general happiness. Therefore, bringing this idea to light made me understand how important it is to know who--or what for that matter--you are competing with. Instead of beating myself up about something, it would be better to take this frustration and use it as fuel to achieve my goal. So, I could make it a point that when times get tough and I'm a bit overwhelmed, I need to be sure to revisit the thought: "Know who your opponent is."