. . . knowledge emerges in (humans). Opposed to knowledge is the spirit. The spirit is formless and is incomprehensible to mundane thoughts. . . . Knowledge is active, mischievous, and intelligent. It changes constantly. Spirit, on the other hand, is the master of humankind. Its origin is in wu-chi. . . . It is never born and it never dies. The spirit tends toward purity and stillness. Knowledge tends toward action and disturbs the mind so that it cannot be still. . . . Recognize the difference between the human mind and the mind of Tao. Do not mistake the human mind for the mind of Tao, and knowledge for the spirit.
Source: commentary on T'ai Shang Ch'ing-ching Ching, written in Six Dynasties Era (220-589 AD), p 35-37
Contributed by: Zaady