From the description:
 
“The wings just marked the beginning. I wasn’t a princess yet. The wings were the point of no return. I wasn’t a normal pony either. I still had much to learn.  
I learned all that was required and then some. Towards the end of my lessons Luna and Celestia gave me a warning. That soon I would go through my true initiation. Not only into princess-hood, but god-hood. I had no idea what to expect. It came without warning. There was no earthly ceremony, no tradition, no audience.  
It was one single moment. A threshold if you will. Like peering through an open seem connecting two worlds.  
It was a moment that I will never forget. I saw – everything. I saw the creatures that dominated our world before us, and the creatures that may follow us. I saw where we’ve been, where we may go, and where we must never go. I saw everything from beginning to end all in one instant. It was beautiful and absolutely overwhelming.  
Tense… It seems irrelevant in hind sight…  
At least I know I am still me. Only I could see what I just saw and comment on the grammatical implications.
 
–
 
“The separation between past, present, and future is just an illusion; however persistent.”  
-Albert Einstein”