You achieve immortality, and then what?

Immortality is a cage, and Shen Gui has been trapped there for far too long. He has traversed the highest mountains, slain the strongest demons, and witnessed ten thousand sunsets. He was invincible, yet all was well, until he slowed his pace and began to observe the insignificant aspects of human life. In a year of great plague, a county was afflicted. The magistrate led the entire city in sealing off its gates, and on his deathbed, he erected a monument with the inscription: "[No one survives here; no need to offer sacrifices when passing through]." Shen Gui lit three sticks of incense as he passed by, and the incense before the monument has never ceased since. Border troops covered the rear, with five hundred men guarding the pass. When reinforcements arrived, the pass had already fallen, and all five hundred men were dead, their spears planted firmly on the ground, their bodies standing upright, facing the capital. ...Shen Gui was merely passing through. But some things were too heavy, so heavy that he had to slow his pace.