Board Thread:General Discussion/@comment-28885320-20160711182624/@comment-26814804-20160912170011

Well, it's obvious that Frisk is vastly more determined than the average human- at the very least, more than six times more determined. After ASRIEL absorbed the six human SOULS, and all the monster SOULS, he had the combined DT of six humans and all the monsters. The power that those SOULS granted him was more than enough to destroy the timeline, or even the Whole World, but he wasn't determined enough to reset the timeline, because Frisk ''still has more DT than he does. ''

Therefore, something is making Frisk determined. In fact, since PS Flowey is able to manipulate the timeline, and ASRIEL isn't, that strongly indicates that TP! Frisk is much, much more determined than Neutral! Frisk, especially considering that TP! Frisk has Refusal.

I think the answer to all of this is the fact that you have to complete the Neutral ending once before you complete the True Pacifist ending. In order to reach the True Pacifist ending, you have to beat ASGORE and Photoshop Flowey, finish everything, finally ecscape- and then ''come back. ''Come back, JUST because you want to SAVE everyone. I feel that that is why Frisk is so determined, simply because they care so much that they're willing to do it all over again to save their friends.