Pathfinder WotR: (True) Aeon Ending

If I prevent myself from obtaining mythic powers and therefore cannot exist, does that not prevent me from preventing myself from obtaining mythic powers and therefore being unable to exist? Pharasma acknowledges your existence, so I suspect that you exist out of time but cannot exist within the timeline. Someone always has to be able to appear to stop Areelu, so on some level that person has to exist in that moment. Some sort of shenanigans is going on, or else this is a classic time paradox.