此中三昧

Explanation: Samadhi: Buddhist terms, transliteration of the Sanskrit word, means "definite", that screen never distracting thoughts, so that peace of mind, is the Buddhist cultivation of the law. This analogy inside the subtleties. 　　Source: Tang Lizhao "fill in the national history" monk Huai Su, Changsha good cursive, since the words have Caosheng samadhi. "