Final answer:
In the Zhuangzi, fasting the mind/heart is a Daoist practice for becoming open to Daoist teachings, particularly wu wei, which is about acting naturally and spontaneously in harmony with the Dao. It emphasizes letting go of desires and striving, to live in accordance with nature's flow.
Step-by-step explanation:
In the Zhuangzi, fasting the mind/heart is the practice designed to rid ourselves of preconceived notions and prejudices, which allows us to be more receptive to the teachings of the Dao. This concept is part of a broader Daoist philosophy that emphasizes wu wei or nonaction, which is the natural way of acting spontaneously or immediately, in harmony with the Dao. It requires freeing oneself from desire and striving, and moving with the natural flow of existence.
The Zhuangzi shares stories and metaphors illustrating this principle, such as the tale of Cook Ding, whose effortless mastery in his craft exemplifies wu wei.
Daoist texts encourage adherents to develop an attitude of connectedness, not individuality, and to live in harmony with the way of things, embodying softness and adaptability rather than force and resistance.
Fasting the mind/heart is thus a method of preparing oneself to embrace Daoist principles, particularly wu wei, fostering receptivity to life's natural movements, and maintaining balance with the Dao.