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In the path of alchemy, one refines and transmutes their spirit into a gleaming spirit pill, which ascends to the central palace where one searches for their true nature and refines their spirit, a process known as "ming xin" or clarity of the heart. The yang spirit takes flight and rises to "see nature" in the brain. One builds up the lotus platform and nourishes the fetal breath, fostering the transformation of the spirit embryo. Silently nurturing it, one awaits the appropriate moment when the purple qi arrives, allowing the spirit infant to grow strong and leave through the heavenly gate, and then return, reaching the divine state of a non-defective infant.

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