No thought, no idea

Munyeom musang (무념무상) is a term from the spiritual vocabulary of kumdo. The glossary of the Korea Kumdo Association (Daehan Kumdohoe) defines it as a state of mental unification in which every thought has left the head, a state of mind like myeonggyeongjisu (명경지수).

According to that glossary, it is understood only after advanced kumdo training and is the highest level of spiritual cultivation. In this state the four warnings of kumdo (sagye, 사계) are completely absent and the person is healthy and calm.

• Myeonggyeongjisu (명경지수): a mind so still that it has not even the slightest ripple. In that state the opponent's psychology and the content of the attack are reflected in oneself as they are.
• Sagye (사계, also called the four sicknesses): gyeonggu-uihok (경구의혹), that is surprise, fear, doubt and perplexity. If even one is in the mind, the mind becomes confused, cannot see the opening in the opponent, and shrinks, creating an opening in oneself.
• Pyeongsangsim (평상심): the everyday mind. The four warnings damage it, and cultivating it is one of the aims of kumdo.

In general Korean usage, munyeom musang is a Buddhist term (the characters 無念無想 mean no thought, no idea) for having no thoughts and reaching the state of non-self. One explanation from that tradition adds that it does not literally mean the absence of all mental activity, but not letting thoughts give rise to clinging or false discrimination.