The Ijang'ui; "The Doctrine of the Two Hindrances." An in-depth treatise concerning the various theories developed on the doctrine of the two hindrances 二障 of the Yoga^ca^ra school 瑜伽行派， by Wonhyo 元晓. HPC 1.789-814. This treatise examines and compares the various explications regarding the two hindrances as found in the major Yoga^ca^ra texts， most prominent of which are the Yoga^ca^rabhu^mi-/sa^stra 瑜伽论， Sam!dhinirmocana-su^tra 解深密经， Maha^ya^na^bhidharma-samuccaya-vya^khya^ 对法论， S/ri^ma^la^devi^-simhana^da-su^tra 胜鬘经 and Prakarana^ryava^ca-/sa^stra 显扬论. Wonhyo first defines characteristics the hindrances in great depth， in terms of both esoteric an exoteric interpretations. He then explains how they are to be removed in terms of the various Yoga^ca^ra path scenarios， how their removal is handled by different classes of practitioners， and so forth. It is one of the most instructive works available for understanding the Buddhist notions of defilment/affliction and the obstructions to enlightenment created by the discriminating human mind.