Shi Feiyang recited what Elder Xue Xue had secretly learned from the Heavenly Library and then covertly transmitted to his daughter in the Lower Realm, Lady Bao Xiang.
Elder Xue Xue was merely one of the myriad guardians in the Langhuan Book Library. Stealing Immortal Laws violated the heavenly precepts. He had to do it behind the backs of others and his superiors, pilfering an unorganized mix of Spells here and a Dan Recipe there, and when transmitting them to the Lower Realm, he had to be extremely cautious to avoid detection.
What he had learned was incomplete, and what he passed on to his daughter was only a part of that, which by the time it reached Shi Feiyang, was reduced to just these few phrases.
However, even those few phrases were true Immortal Laws of the Upper Realm!