In the magnificent history of the Three Kingdoms, heroes emerged in large numbers and advisers came to the fore. And Sima Yi, with his unique philosophy of life and forbearing wisdom, eventually became the master of this period of history. This book does not aim to repeat those familiar battlefield legends, but attempts to read between the lines of history books to restore a wise man who always maintained an astonishing sobriety in the whirlpool of power. Through his words and deeds at key nodes, we analyze how the wisdom of life deeply rooted in Chinese culture was tempered into the power to change the direction of history in a world of great strife.