This thesis intended to illuminate which meaning Han Gang Jeong
Gu's XinJingFaHui[心經發揮The Elucidation of Sacred Scripture of
Mind] has in the total system about his idea of Confucian Classics
by analysing its format of organizing and content characteristics.
When Jeong Gu would have compiled XinJingFaHui, he had adhered
the purpose tried to transgress this book with dissatisfaction of
Jeong Min-jung's XinJingFuZhu[心經附註The Annexed Annotation
of Sacred Scripture of Mind] system. What Jeong Gu pays attention
to can be summed up several subjects be connected with one
another as follows. First, He desired to clarify that a study of
enhance of virtue[尊德性], which Jeong Min-jung regarded as the
reasonable argument of Zhu Hee's later years, is not absolute in
the cultivation of mind and should keep a balance with investigation
of knowledge[道問學]. The second, he intended to derived a
foundation of investigation of knowledge from the metaphysical
cosmology of Neo-Confucianism turned on the Great Ultimate[太
極] and natural principle[天理]. In sequence, his study of propriety
basically displays contents and process of investigation of
knowledge by manipulating basically the criterion of conduct code
and a matter of practical knowledge for moral practice of personnel
affairs. Summing up, Jeong Gu's study of propriety presented
primarily argument of propriety as concrete contents of
investigation of knowledge on the basis of XinJingFaHui, through
which he accentuated on one hand maintenance of equilibrium with
investigation of knowledge, on the other hand reverence of
enhance of virtue as a study of one’s characteristic. Whereas,
XinJingFaHui attempts to secure objective legitimacy for
maintenance of equilibrium between enhance of virtue and
investigation of knowledge by depending on the concreteness of
his study of propriety. From the point of view of Han Gang Jeong
Gu's system of Confucian Classics, the study of mind of
XinJingFaHui and thought of propriety study represented by
WuXianShengLiShuoFenLei[五先生禮說分類The classification of
propriety theory by five teachers] can be defined as two core
theories which unify the study of enhance of virtue and
investigation of knowledge and have an indivisible organic
correlation. In the final analysis, Jeong Gu's Elucidation of Sacred
Scripture of Mind plays a role as a bridge between cosmological
moral metaphysics of Neo-Confucianism and study of propriety,
which is composed of practical standards for moral action. This
work embodies theory of system through which he explains a found
and process of cultivation of mind by encompassing enhance of
virtue and investigation of knowledge according to reverence and
expansion of knowledge.