Ravenclaw is associated with air, Gryffindor is associated with fire, Slytherin with water, and Hufflepuff with earth. Rowling intended this to be a reference to the balance between the houses, and the need for balance between the traits that the houses represent. Ravenclaw’s association with air is also connected to its other symbols.

Wisdom, wit and intelligence, might make a person smart enough to be a Ravenclaw, but how one chooses to apply those abilities counts, too.

It is important for Ravenclaw's to be very original in spirit. they are the type of people who are always questioning the staus quo.