Perception

It's so incredible to me how your past experience and personality can dictate how you feel about a song or a poem or even a phrase, or how you interpret an interaction, memory, or recollection. You are a slave to your own perception and no matter how hard you try to be open-minded, you lean back on your own barometer determined by your childhood, your college experiences, and how you choose to analyze and internalize your life experiences. Big moments, small moments...even a seemingly innocuous comment can stick in your brain and alter your frame of mind. 

The truth is a concept we conclude through these filters, which is why there is a plague of disagreement  and misunderstanding.