This is one of my favourite passages on yoga (from Poser, p. 152): ‘People think yoga is boring. This is one of the big raps against it. And it is, if you’re not concentrating. If you fling yourself into the pose, and let your mind wander, and merely tolerate the experience, yoga is, in fact, extremely boring. But if you concentrate hard, boredom opens up and the pose becomes the most interesting thing on earth, in fact the only thing on earth. The more you practice dharana, the simpler the world gets’.