She can swim far and wide across the waters of Equestria, but it's not enough. There are places above those waters, places she plans to reach. Where biology failed her, her mind would succeed. Equestria better be ready, because she plans to visit!
She did it! She's not only gotten into school, but Celestia has taken her under wing, quite literally at times. It's her first day of direct tutelage and Twilight is beside herself with anticipation.
We walk down our long roads of life, but what of the roads not taken? Twilight and Applejack are carried along a different path, where their fates were bound in new ways.