Unicorns are Elite. Just ask them. All must enroll in Celestia's Magical University in Canterlot. The motto however is adhered to without exception: Only the best, only the Elite. May Celestia show them mercy if they fail any task. The Princess however, has none to give.
In a society where knowledge is power, the unicorns of Canterlot refuse to be anything less than the best. Everything depends on it. Everything. Money, friends, it all is based solely on how well you've done at the Academy. Failure is not an option. But don't fret, even the failures will graduate...Eventually. They have to. Because at any cost all Unicorns must be:
Only the Best, only the Elite.