Literature Reference: 虚极仙宗本，希夷象帝先。—— 《郊庙歌辞 太清宫乐章 序入破第二奏》 The utmost void is the foundation of the immortal sect, resembling the primordial emperor in its subtlety. Source from 'Jiao Miao Ge Ci Tai Qing Gong Yue Zhang Xu Ru Po Di Er Zou'.
虚: Illusion. Idleness. Vanity.
极: Positive, North Pole. Originally referring to the main beam of a house, it later extended to mean the pinnacle, the highest point, and other similar connotations.
Meaning: The utmost void signifies the highest state of Daoist pursuit, embodying depth and transcendence.