To clear, nourish, and shield is essential in energy cultivation. Some knowledge is suggested before engaging in this meditation. This includes being aware of the Taoist energy center locations: upper tan tien is in the head area, middle is heart, & lower is belly. Know the North Star, 5 element theory, & appropriate posture. By cultivating each spirit of the 5 elements within yourself, you encounter microcosmic echoes in organs, energies, &healths: For example, shen corresponds to the heart organ energies, fire element, also joy, clarity of mind, creativity, &reputation. Yi corresponds to spleen organ energies, also earth element, discernment, freedom from excess worry, & effortless compassion. Po to lung organ energies, also metal element, physical robustness, release of grief, appropriate boundaries, &prosperity. Zhi to kidney organ energies, also water element, strength of will, &life purpose. Hun to the liver organ energies, also wood element, ethereal soul, alchemy, work ethic.