You know how sometimes, when it gets a bit chilly, you simply drape a jacket or cardigan around the shoulders without slipping the arms into the sleeves? Then, if you're moving around at all, you need to hunch the shoulders slightly to prevent the garment sliding down the back to the floor? Well, each time we retreat into the safety of self – into our own private world – its as though we slip on a jacket like this, which, unless we really concentrate the spirit, we never quite discard. So we end up going through the day wearing thousands of invisible jackets; shrouded in self.