This paper is intended to reinterpretate the essence–Ontic Dasein of Socratic Life and Death which reveals and exhibits in very brilliant as well as splendid Plato's Phaedo Dialogue. In order to illuminate the ultimate concern for caring the existence of soul–Noûs by Socratic Plato. So as to make out vital virtue of 'Idealism' to the comprehensive prehension in contrast with the signoptic view of Oriental Confucianism-Taoism-Zen Buddhism (Chan).