I was re-reading HSDS and during the ZWJ's first encounter with the 3 Shaolin Du monks there is this line in the passage:
"ZWJ was astonished to see the three whips moving without producing any sound. The internal energy of the whip wielders were pure and flawless to an extent that ZWJ could not match, and he thought: ' YuanZhen said his three grand-martial uncles were guarding godfather. This three elderly monks must be them. Their internal energy are extremely deep and profound!' "
My impression was that ZWJ had the highest level of internal energy in HSDS (not entirely sure of this either, can someone confirm?). But it seems that his internal energy was massive but not entirely pure? So what's the subtle difference between having pure energy and high internal energy? In a duel between two people with similar levels of internal energy, would the person with a "purer" internal energy win? Or could someone with lower but purer internal energy defeat another with higher level of energy?
Not sure if this has been discussed before but would like to hear what you guys think.