We relax in taiji so that natural tensions can take over from our own selfish ones. When I relax the first thing I feel is a sinking – the Earth pulling me down, then an expansion – the world drawing me out. If I want to sustain this relaxation then I must learn a natural internal tension – a draw into my core/belly – a ruthless vigilance of sorts, without which my moments of relaxation will inevitably alternate with reversions to old habits – the experience of most of us.