The theory proposed by Su Xin is indeed novel, something beyond the imagination of ordinary people.
In the past, powerhouses of the Great Celestial Demon Lord's generation ascended to the Sky-Reaching Realm by Stealing the Heavenly Secret. This was an accidental discovery, also the first method they found. It was by this means that they were able to stand equal with the Demon Race, reaching a realm of the Sky-Reaching that Human Warriors could never have imagined, slaying the Great Sages of the Demon Race, and launching a full counterattack against them.
Therefore, according to the normal thinking, this was the first method they discovered and it should be the right one. For those like the Great Celestial Demon Lord who had already reached the Sky-Reaching Realm, how could they possibly go back and ponder whether the path they had taken was wrong after all?
