"If those who learn T'ai Chi Ch'uan do not know what Mencius (孟子) meant by "Seek the released mind," they will find that their cultivation of ch'i is meaningless and simply tiresome. The Classics say that the mind and the ch'i stay together in the tan t'ien. This is the "seeking of the released mind" to arrive at the perfect place of cultivation without harm. Do not force it and do not forget it. Let the Great Ch'i be naturally cultivated. When people practice in this manner, then they can establish their merit, their virtue, and their words. Do not worry about other matters. The way is simple and easy. Do not waste time...You can cultivate the ch'i while walking, sitting, standing, lying down, speaking, laughing, drinking or eating. You can cultivate the ch'i at every opportunity, inseparable from daily life."
- Professor Cheng Man Ch'ing (鄭曼青), Cheng Tzu's Thirteen Chapters on T'ai Chi Ch'uan