But is your mind really yours? We are basically composed by our surroundings and live in accordance with society's requirements. That is why at some point or another, everyone hits that shitty low point in their life where they feel lost, questions their existence and does not even know who they really are. We try to find ourselves in other people, in materialistic matter or religion. We try so hard to find ourselves because we're in fact nothing. You are just your own construct and have absolutely no value to the world. When people we really care about leave, we feel empty and that itself is just proof that we depend on others to fill some what complete.