“I’m Rainbow Dash… This is the pony you wanted me to see? She looks just as old as I do. What gives?”“This is Twilight Sparkle, my personal student and a very gifted unicorn. She has a great deal of potential, and I get the feeling the two of you will be spending a lot of time around each other…”
A depiction of an early scene in Little Glimpses: www.fimfiction.net/story/380650/little-glimpses