This book is a masterpiece of the renowned scholar Wang Jiuxing’s lifelong philosophical exploration and was compiled after his passing at the request of his family. The collected writings span nearly half a century and, in terms of content, comprehensively reflect Mr. Wang Jiuxing’s academic thoughts, encompassing the entire development history of Western philosophical thought from Plato to Heidegger. Form-wise, there are academic papers the author presented at international academic conferences, lecture notes from when he taught at the Department of Philosophy, Tsinghua University, in the 1940s, as well as speeches he delivered at research institutions such as the Institute of Philosophy, CASS.