Our souls are made of water, Goethe says. So too, our bodies. There is a flow within us, rising and falling, unidirectional, to the heart. there is a flow without also. We circulate. We are drawn up, and we fall back down to earth again. It's all haemodynamics.

Our souls are made of water, Goethe says. So too, our bodies. There is a flow within us, rising and falling, unidirectional, to the heart. there is a flow without also. We circulate. We are drawn up, and we fall back down to earth again. It's all haemodynamics.