"The Two-Petal Realm in internal arts and the Eight-Transition Realm in external arts are both critical thresholds. The difference between internal and external arts is actually very simple, and breaking through this barrier is also quite simple."
Wang Han looked at Yu Nian. It was like a super genius student pointing to a notoriously difficult problem that had stumped thousands, only to declare that it wasn't hard at all.
"Whether it is external arts or internal arts reaching the Chaoyuan Realm, neither can be separated from the connection between humanity and nature. The difference between the two is that internal arts use nature to observe the self, whereas external arts use the self to observe nature."
Chapter 775