Lines

Demitri Martin did a bit on this once. He talked about lines and how they can change objects. For instance, take these cups of coffee I drew:

A regular cup of coffee.

With these squiggly lines it becomes a hot cup of coffee. 

Now it is a loud cup of coffee. 

Now it is a fast cup of coffee.

This is where you get out of the way when you hear a loud, hot cup of coffee flying fast toward your face.

Lines change everything.