Cook vs. Chef

"A cook and a chef are different entities. Chef is a title. A chef can be good or bad or everything in between; he or she can be a hotel chef, restaurant chef, TV chef, personal chef, or a corporate chef. Chef denotes a job. But when you are a cook that is who you are. It's your spine and soul. It suffuses all that you touch."

I've seen this quote being cited by both Michael Ruhlman and Eric Ripert. I'm not sure who said it but it's a damn good quote.