This writer divides the reading method of Toegye into the content and the form, and then inquire into Chunin-hapil(天人合一) of Toegye under the category of the content. The results are as follows. Firstly, Chun(天) in the outside of the reading method is a subject moving lively and changing, and even though Chun(天) and In(人) are same in the ultimate origin, In(人) is a being depended by Chung(淸)․Tak(濁)․ Soo(粹)․Bak(駁) of Gi(氣). Secondly, Chun(天) and In(人) in the inside of the reading method are contradicting to each other. It is thought that Toegye widened up the distance between Chun(天) and In(人), in order to call upon In(人) to strenuous effort in the aspect of oughtness. Thirdly, Chun(天) is moving and approaching to In(人). And In(人) is approaching to Chun(天) by way of self-cultivation. It is possible to say that Toegye closed the distance between Chun(天) and In(人) by giving a function of Hwalmul(活物) to Chun(天) and In(人). Fourthly, the essence of beauty which Chun(天) attains is defined and sprouted by the mind of In(人), and when In(人) as an abstract concept is vitalized, and looks at the outside world, the aesthetic quality is generated. The aesthetic quality of Chun(天) is a sublime beauty, and the aesthetic quality of In(人) is a beauty of elegance and humor.