Are there secrets which cannot be understood by mortal kind?

Twilight wanted to prove Celestia wrong. She wanted to be worthy of her praise, to exceed masterfully where others had failed. To do so would cement her place in history as one of the greatest mares to have ever lived, immortalized as Princess Twilight Sparkle.

Instead, Twilight discovers that no matter how great one's mind or powerful their curiosity, there are some things that were never meant to be known.