How does Michael Ruhlman use imagery in The Making of a Chef: Mastering Heat at the Culinary Institute of America?

Imagery:

"The lesson it taught me was that the chef hadn't used the potato as a basis for displaying flashy, flamboyant skills, but had placed his skills as an artist in the service of the potato." (pg. 7)

"Cooking is a mad dash. Baking is different. Baking is regimented. It is disciplined." (pg. 189)