"Recognize the romanticism of history but do not be fooled by it."
Even when it comes to the food.
Sentimentality is a powerful emotion. You remember "good times" from the past and want to try and recreate them over and over. Couple that with the natural human trait to replicate those behaviors that brought them success or accolades, as if the situation or circumstances never change, and you've got a recipie for stagnation. We spend so much time trying to replicate past success that we forfeit new successes we could acheive.
And that truth can be applied to so many things.