In the Philebus, Plato considers pleasure to be part of the good life. Always despises pleasure, Plato, however, no longer insists on extreme rationalism, instead, he reconciles reason and pleasure with the fundamental principle of ‘measure’ In the Philebus, Plato considers ‘measure (μέτρον)’ to be of the highest value. He not only argues for the concrete application of ‘measure’ in the sensual world, but also confirms the metaphysical ground of ‘measure’. Many scholars have discussed the application of ‘measure’ from different (...) perspectives, but the deep logical principle of ‘measure’ has not been clarified clearly yet. Actually, the thought of ‘measure’ involves the relationship between ideas and sensual things. On the basis of the redefinition of this relationship, Plato proposes that a life that mixes reason and pleasure is a good one. On the one hand, ‘measure’ gives a certain rationalistic color to pleasure, and on the other hand, ‘measure’ protects pleasure from being replaced by reason. In this way, Plato turns to moderate rationalism, pioneers the principle of ‘measure’ in dealing with ethical issues, and draws a line between the gods and man. (shrink)