This thesis makes a thorough analysis of Plato's concept of Idea by referring to many important Plato's dialogues, with studying some other concepts, such as nous, noesis, auto, etc.

本文通过参考柏拉的许多重要对话，对柏拉的理进行了深入的分析，并研究了其他一些，理性、非理性、自性等。