“Qing” or lightness in Taijiquan cannot be explained as ‘not using force’ by our simple logic. Qing is something that relates to heaviness. Qing means not using “Bao Fa Li” (Explosive Power), and also avert from “Double weighted.” Qing is also not sluggish. Sluggish and Bao Fa Li are Taijiquan’s major forbidden. Qing is having power but not using it. This is the reason why Taiji Jin be explained as “It seems Song but not Song, be extend but not extend.” Taijiquan’s movements, hands, eyes, body methods, stepping methods, etc., are all in between having force and having no force. During the state of being extend but not extend, your emptiness and fullness must be distinguished clearly. Therefore you can form Taiji Jin.
-Ma Yueliang-
馬岳梁先生——”太極拳的『輕』不能用單純不用力來解釋。輕是相對於重而言的。輕就是不能用『爆發力』，避免雙重。輕也不是鬆懈。鬆懈和爆發力均為太極拳之大忌。輕是有力不用。所以說『似松非松，將展未展』為太極勁。太極拳的動作、手、眼、身法、步法都介於有力無力之間。呈現將展未展之勢，虛實宜分清楚，才能構成太極勁