The song "You Think You Know" by Horse Head explores themes of misunderstandings, personal growth, and the pain of being betrayed by someone you trusted. The lyrics express the feelings of being underestimated and misunderstood by others, while simultaneously acknowledging the hurt caused by a specific person. The song suggests that despite the belief of others that they understand the protagonist, they actually have no idea about their true thoughts and emotions. The protagonist questions how someone can continue their life without them, highlighting the impactful role this person played in their life. The line "Close my eyes like I was sleeping, but really I was faking my own death" suggests that the protagonist has developed a defense mechanism of appearing detached and unaffected, even though internally they are hurt and struggling. By faking their own death metaphorically, the protagonist is using this tactic to protect themselves from further pain. The lyrics also touch upon the theme of personal growth and change. The protagonist reflects on the time they have wasted, realizing that they need to make changes and move forward. The line "Looking for you under club lights, I couldn't tell who was right, but I was wrong to write you off like that" suggests a realization that they may have been too quick to judge or dismiss the person who betrayed them. Overall, "You Think You Know" portrays the pain of being misunderstood and betrayed, while also acknowledging the need for personal growth and self-discovery. The song captures the emotional journey of the protagonist as they navigate through these experiences and reflect on the impact it has had on their life.