三学

The "three studies" or vehicles of learning-- discipline, meditation, wisdom: (a) 戒學 learning by the commandments, or prohibitions, so as to guard against the evil consequences of error by mouth, body, or mind, i.e. word, deed, or thought; (b) 定學 learning by dhyāna, or quietist meditation; (c) 慧學 learning by philosophy, i.e. study of principles and solving of doubts. Also the Tripiṭaka; the 戒 being referred to the 律 vinaya, the 定 to the 經 sūtras, and the to the 論 śāstras.