Monkey Mind Talks

The term monkey mind or mind monkey originates from Chinese xīnyuán or Sino-Japanese shin'en (心猿), a word that literally means "heart-mind monkey." It is a Buddhist concept that describes a state of restlessness, capriciousness, and lack of control in one's thoughts. This "mind monkey" metaphor is not only found in Buddhist writings such as Chan or Zen, Consciousness-only, Pure Land, and Shingon, but it has also been adopted in Daoism, Neo-Confucianism, Chinese poetry, theater, and literature. The expression "monkey mind" commonly appears in two reversible four-character idioms paired with yima or iba (意馬), which means "idea horse": Chinese xinyuanyima (心猿意馬) and Japanese ibashin'en (意馬心猿) illustrate the interconnectedness of a restless mind and wandering thoughts. The "Monkey King" Sun Wukong in the classic Chinese novel Journey to the West is an iconic personification of feeling indecisive and unsettled.

From Monkey mind on Wikipedia