“Loy Lau Hoi Sung, Lut Sau Jik Chung.” This means: “Retain what’s coming in, send off what’s retreating; Rush in upon loss of hand contact.”
The most important lesson of Chi Sao starts by understanding the Tao. The Tao teaches us to flow with life, as nothing can interfere with the natural order of the universe in its suchness. The Taoist thought is very extensive but draw your attention to what is described as wu wei (non-action, a natural action), specifically with the art of detachment and spontaneity.
How many times have you heard to stay calm in a fight, and that the secret to fighting is to stay relaxed. Yet, when engaged thoughts are overwhelmed with emotion and the desire to win or flooded by anxiety and fear. When such behavior is observed, you must, “Forget about yourself and follow the opponent’s movement. Let your mind, the basic reality, do the counter movement without any interfering deliberation. Above all learn the art of detachment.”(Grandmaster Ip Man)
The art of detachment is to be free of thoughts and emotion. This process will lead you into a journey of self-discovery. Only then will you be able to control yourself without partiality.
The physical level of Chi Sao teaches us about spontaneity. A theoretical aspect of freedom transcending into muscle memory unique with every practitioner. For example, one may respond with a Pak Sao(Slapping Hand), another may use a Lop Sao(Pulling Hand). Ultimately, Chi Sao creates a subconscious army of natural reflex responses commanded only by a moment in time.
To summarize: Be Thoughtless, Be Emotionless, and Be Natural; or
Be Like W….