Death came to everyone, and it marked both a beginning and an ending. While no one knew if people were truly reborn, there was a traditionally held belief among cultivators that those who lived righteously would be reborn, and that the good karma they had accrued would carry into their next life.
Wu Jian didn’t know if people truly were reborn after they died. What was a soul, exactly? Did humans truly have souls that could transcend the flesh? He’d never really thought about this before, but a lot of people, cultivators especially, feared death. That was the reason so many people cultivated. They wanted to live longer, but the longer one lived, the more they feared dying.
Perhaps the idea of rebirth had come about because of that fear. The idea that you might be reborn as another person held appeal to many because it meant you weren’t truly dead. Your soul might be cleansed, your memories gone, but you still lived.