I saw a "great" job advertisement the other day at Burger King.  Yes, Burger King.  It was simple and direct:  Hiring Great Managers.  There it was on that big sign outside the building.  Three simple words.  To the point. 

I immediately saw how they were clearly requesting that "great managers" need only apply.  "Average" and "Poor" managers -- don't waste your time.  (Of course, they will, but that's a problem for another time.)

Assuming an applicant actually reads the sign before applying, it will take some confidence and belief in themselves that they are a great manager.  If you were a great manager, would you want to be a manager at Burger King, unless you were going to be working with other great managers?  And won't it feel good to be hired as a manager there, knowing they have high standards?

At the same time, the sign communicates to their customers that they value quality - we hire "great" people (...who are capable of serving "great" food with "great" customer skills.) 

All in three words.