The history of seon buddhism shows that Secondhand demonstrations of Silent-Penetration Seon(黙照禪) are formation and development around Jodong sect. Especilly, in that the method of trainning in Jodong sect(曹洞宗) is Silent-Penetration seon, we must examine the thoughts and backgrounds of it. The prime thoughts of Silent-Penetration Seon are BonjeungJagak(本證自覺), Bisaryang(非思量), JigwanTajua(只管打坐), Bulyumo(不染汚), ShinsimTallag(身心脫落), HyunsungGongan(現成公案) and what not. The prime backgrounds were misunderstanding of seon trainning in Tang-dynasty, questions and answers between master and pupil, a malignant Patriarchs Seon, and etcs. According to this circumstances, in Jodong sect adopt a standpoint of purity seon(純粹禪). All the more, attempting the practice of trainnings and awakenings about englightenment. The actualization of trainnings and awakenings were the method of counting respirations, sitting straight of body, right mind in everydays. The forerunner was JinhulChungryo(眞歇淸了). He had worked of Silent-Penetration Seon to development at that time. The act and trainning of Silent-Penetration Seon by JinhulChungryo was the origin and ground Silent-Penetration Seon.
