"As time passed...she came to look upon these early years of her life in Ponyville as the happiest in her life. No matter what came before or afterwards, this was the time she viewed as the most beloved, the most sacred in her eyes. But, in her later life, she came to dwell on all the bad, all the negative. She regretted not embracing the friendships as much as she should have done. She regretted every missed opportunity. She...she wanted to do it again, knowing how precious those moments were, and to appreciate the time she spent with her friends, more than she did the first time."
Celestia frowned slightly, though still looking a little confused.
"So...she used this great spell...risked changing the entire history of Equestria...just to make you love and appreciate your friends more?"
Although looking somewhat ashamed, Twilight nevertheless nodded. She kept her gaze away from Celestia, imagining all the things going through her head. She'll be angry with me, I know it! She'll say I was irresponsible with time, that I risked too much for something so comparatively small. And she's right! Future me knows that her time her was good, but she overlooked all of it because she just wasn't satisfied. Celestia will be so disappointed in how I turned out! But, to Twilight's utter shock, she heard no anger nor a berating voice from her mentor, but rather, laughter. Raising an eyebrow, Twilight looked up, seeing Celestia put a hoof to her mouth to stifle the giggles that were coming out of her. Seeing the look of confusion upon her student's face, Celestia calmed herself down a little before explaining herself.
"Oh, Twilight. Do forgive me, but...that is so...you!"
Twilight looked taken aback by that, prompting Celestia to explain herself.
"Using magic that powerful, trying to re-write history...just so you could get it better the second time around. If there is a more Twilight-y thing out there, I don't know of it."
https://www.fimfiction.net/story/259631/28/a-second-chance/truth