Xu Heng-Shan is the most unforgettable disciple of Wang Yang-Ming in his whole life. The diligence stimulated from their meeting to love each other formed the overture of Nouslogy. Xu Heng-Shan determinedly became the believer of Nouslogy as the most difficulty time in Wang Yang-Ming's life. They mutually constituted inseparable ”I-Thou Relation.” He passed the highest imperial examination with love of Wang Yang-Ming and dedicated his life to governmental service. He was deeply respected and supported by general public, however, he found that it is hard to fulfill ideal. He further hoped to grasp the Entity and therefore gave up public service without regret. He bought the farm land as the place for spreading Nouslogy. Unfortunately, he died in disease with his lofty aspirations unrealized at the age of 31. This was a deep shock to Wang Yang-Ming. He wrote four funeral orations in different times to express his endless mourning and decided to elaborate Nouslogy as if Heng-Shan was present. Though his disciple in later period, Qian Hsu-Shan, had never met Xu Heng-Shan, he grasped the life nature of ”Zhong Xing” (internal experience and fulfillment of life) through observing the wife of Heng Shan, Wang Shou-Rang, about untiring presence of love toward Heng-Shan. He especially emphasize discipline of actual affairs that happened to show how Yang-Ming, Heng-Shan and Xu-Shan fulfilled fidelity to each other. The depth of love in them actually went across the line between life and death This is what we said ”Presence of Constancy.”