Two Indispensable Prerequisites!

"In fact, we considered the possibility you mentioned before. After I discovered that Wuying Qi controlled remarkable brainwashing technologies that were similar to what the Covenant Alliance had, I speculated whether or not he would commit any insane, heinous crimes with the evil technologies. However, it is terribly difficult."

Li Yao pointed at his head and said, "The critical factor is energy. As the saying goes, it is easy to change the commander of an army, but it is not as easy to change someone's mind. It means that the souls, feelings, and self-awareness of human beings are too hard to be easily corroded and twisted.

"As a matter of fact, changing someone's idea and making him accept the opposite of what he used to believe is a hundred times more difficult than killing him directly."