The difference between wit and humor

As defined via The Opinion Mill:

In his book Paradigms Lost, John Simon points out that humor and wit are nearly polar opposites. Humor is inclusive: it invites everyone to join in on the laugh and feel like one of the crowd. Wit is exclusive: it addresses itself only to those who are in the know, and if the other people in the room feel uncomfortable because they don't get it -- hey, that's a bonus. Colbert's performance was a display of wit at its most lethally cutting. He went into a room with the most powerful man in the world and his courtiers, and he excluded them from the land of the free and the home of the brave.