Imagine you're trying to find someone, or even you're trying to find yourself, but you have no senses, no way to know where the walls are which way is forward or backward, what is water and what is air. You're senseless and shapeless--you feel like you can only describe what you are by identifying what you're not, and you're floating around in a body with no control. You don't get to decide who you like or where you live or when you eat or what you fear. You're just stuck in there, totally alone, in this darkness. That's scary.