Major Trends
The first of the Goryeo's two most famous advocates of Seon/Gyo unity was Uicheon. Uicheon was the fourth son of a devout Buddhist king, and entered the sangha at a young age. Like most other early Goryeo monks, he began his studies in Buddhism with Hwaeom. He later traveled to China, where he studied under a number of leading masters from a variety of lineages, including Chan, Huayan, Vinaya, Pure Land and Tiantai. Returning to Korea, Uicheon very actively promulgated the Cheontae teaching, believing that it, as a balanced system, provided a viable solution to the heated Seon/Gyo debate which surrounded him at the time. Ultimately, however, his negative attitude towards Seon undermined his efforts to accommodate Seon adherents, and he died fairly young without accomplishing his mission. Among his most important works are his histories and catalogues of Buddhist texts, which have been an invaluable source for later scholars.
Although the scholastic schools in general waned in activity and influence during this period of the growth of Seon, vitality continued to be seen in the field of Hwaeom studies, where the powerful impetus provided by Uisang and Weonhyo continued well into the Goryeo. Significant Hwaeom studies were carried out by men such as Danmun (900-975), Gyunyeo (923-973), Gyeoreung (964-1053) and Zhiqing (1113-1192). Among these four, it was Gyunyeo who had the greatest effect. He commented prolifically on the works of the Chinese Huayan patriarchs, and lay the ground for the future rapprochement of Hwaeom and Seon by his accommodating attitude stance toward the latter. His works are an important source for modern scholarship in terms of identifying the distinctive nature of Korean Hwaeom. After the mid-Goryeo however, the Hwaeom school would gradually fade from view as a separate institution, and important later Hwaeom-related works tended to be written by Seon authors.
Within the Seon of the Goryeo (and arguably, all of Korean Seon), the most important figure was Jinul (1158-1210). Jinul entered the world at a time when the sangha was in a state of crisis, in terms of external appearance as well as internal issues of doctrine. At the end of the Silla and beginning of the Goryeo, Buddhism had already begun to be infected by secular tendencies and involvements, such as fortune-telling and the offering of prayers and rituals for success in secular endeavors. This kind of corruption resulted in the profusion of increasingly larger numbers of monks and nuns with questionable motivations. Therefore, the correction, revival and improvement of the quality of Buddhism were prominent issues in the works of some of the more important Buddhist leaders of the period, most famous of whom are Uicheon and Jinul.
Because of the pronounced antagonism between the meditational and doctrinal schools, controversy mounted as to how Seon, which was now becoming the dominant force in Korean Buddhism, should view the relationship between scriptural study and meditation practice. Jinul was furthermore deeply disturbed at the degree of corruption that had crept into the sangha, and for this reason sought to establish a new movement within Korean Seon which he called the "samādhi; and prajñā society" whose goal was to establish a new community of discipl
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