the knowledge of something means you can learn something else. he that knows nothing also learns nothing. you begin to exist with a level of awareness. this level of awareness means a way of being different such that you possess certain characteristics that are performed by you as you behave to affirm this level. the level of awareness can change. you are human if your awareness means you possess human characteristics. you cannot continue to exist as human if these characteristics cease to be possessed by you. whatever happens after you cease to exist as human does not matter to your existence as human which involves a level of awareness that involves human characteristics. the spiritual might have a meaning to you. as for me, you may call what you cannot explain the spiritual.