We all seem to think we can be at or near the same place with others if we want. However, we all have thoughts and secrets, which we can not tell anyone, and this makes us feel alone. In a sense, We are all surrounded by invisible walls. If we try to touch someone, the walls will block us, and if we try to get to know someone more, they will prevent it. It is as if we are in the same place, talking, touching, and observing, but living in parallel worlds respectively. We just keep pursuing the reflections on the glass while believing we are following someone or something. And one day we will abruptly realize that we are desperately lost in a labyrinth of such reflections.