In that situation, alienated from my normal surroundings, I realised that the outer surface of what I thought was my unique, individual identity was just a set of routines. We all have an essential self, but if you spend every day chopping up meat on a slab, and selling it by the pound, soon you'll find you've become a butcher. And if you don't want to become a butcher (and why would you?), you're going to have to cut right through to the bare bones of your own character in the hope of finding out who you really are. Which bloody hurts.