Yu Dandan's question struck at the heart of the matter, yet He Qing shook his head regretfully.
"It's not that simple, things aren't so straightforward. The ability to categorize mentally arises because many people can detect this abnormal state of mind and try to change it. If their Divine Soul hasn't completely transformed into a puppet, they can gradually adjust on their own. But if it has become a puppet, tainted by deathly energy, that is, enveloped by an irresistible wave of negative emotions like a Heart Demon, then the person loses their own thoughts, slowly becoming a living corpse."
"They'll eat, chat with others, and think about problems, they're still human, it's just that deep within, occupied by the Heart Demon, they gradually lose their own thoughts."
"This Heart Demon is born from within themselves, and no one but they can remove it; that's what makes it so tricky."
