Literature Reference: 亘古通今，莫不如此。—— 《左传·昭公二十五年》 From ancient times to the present, it has always been so. Source from 'Zuo Zhuan·Zhao Gong Twenty-five Years'.
亘: Unceasingly continuous (in space or time).
Meaning: It symbolizes eternity and continuity, representing something that endures through time.