For some things, when people who knew them felt that no more people should know, these things would become secrets. Over time, fewer and fewer people would know about these secrets. When memories faded with the flying time, secrets would become rumors.
One day, with the time moving on, rumors would become stories, and eventually legends.
Fortunately, quite a few experienced ones still existed among human beings, and neither was the emperor ever absent from the history of the humankind. Si Wen Ming patiently and detailedly told Ji Hao about the story of the all souls creation cauldron.
After that, Ji Hao understood the reason why the cauldron was a secret that only a very few people knew about. It was way too important, related to too many things and people. Ancient powerful human beings turned the cauldron into a secret, and Ji Hao couldn't agree more to that. Some secrets should remain secrets forever.