Modern spirituality is, in its dominant form, a self-improvement project wearing borrowed robes. Mindfulness is sold as a cognitive enhancement tool. Yoga is sold as a fitness product. Silence is sold as a premium commodity: book a retreat, pay for the quiet, come back refreshed and ready to produce. We have taken the most subversive insight in human history - that the self is not the centre of the universe - and converted it into a personal development strategy.