Lifeless lyrics

I hear the voices inside my head! They are screaming, They want me dead! You cannot live with this anymore, The despair takes you to locked door. I see nothing, only my emptiness. I seem alive, But i am lifeless! No way out, you must see! To change your life, i'll show you the way! I see you cry, extremely desperate. You need a reason to explain your existence. But you're so empty (almost a corpse). You need a time to return to essence. Are you sure you are alive? Or you're just a zombie? Are you sure you are alive? Or you're just a lifeless?