The strength of humans will ultimately reach its limit.
Even for many cultivators, these strongest beings who stand at the peak of heaven and earth, though they claim to possess divine powers that shake the world, and skills that reach the heavens, they still have their specialties and weaknesses. They cannot excel in every aspect.
But right now, what Pei Xuanjing is demonstrating makes even these strongest beings doubt themselves. They should know that from the beginning of their cultivation, each one was a uniquely talented individual, excelling above the rest, which allowed them to achieve what they have today.
However, compared to Pei Xuanjing at this moment, their achievements and realm seem somewhat inferior.
If we replaced Pei Xuanjing with any other ancient creature that lived for thousands of years, they would understand if such a creature had this kind of erudition, as a long life provides ample time to study many things.