>"Princess Celestia, I don't understand. If immortality exists, why do regular ponies still have to worry about dying? Shouldn't we study alicorn magic more so that we could develop a way to make all ponies immortal like us?"
>"I understand your concern Twilight, but there is one factor to your idea that you did not consider. If every pony was immortal, then Equestria would become densely overpopulated and that would guarantee ruin. Death is a natural part of life Twilight. It allows the land to maintain balance and order. Which therefore keeps Equestria peaceful."
>"But my friends! They-"
>"As the princess of Friendship, I'm sure you'll have no trouble making new friends as the years go on."
Twilight looks down at the ground, tears in her eyes.

It's definitely a brutal thing to go through, but I don't think Twilight would close her heart off even after losing her friends.

>Princess Celestia looks down from her throne.
>Princess Celestia: " Twilight quit making slide threads"