Can you keep the unquiet physical-soul from straying, hold fast to the Unity, and never quit it? Can you, when concentrating your breath, make it soft like that of a little child? Rear them, then, feed them, rear them, but do not lay claim to them. Control them, but never lean upon them; Be chief among them, but do not manage them. This is called the Mysterious Power.

— Tao Te Ching, Chapter 10

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