This is probably a common; lisp/scheme type of thought. Dan Friedman also said something about how he only likes code that he can hold in his head to think ab

This is probably a common; lisp/scheme type of thought. Dan Friedman also said something about how he only likes code that he can hold in his head to think about in the shower. I forgot the source, but it's in one of the talks. I think Sussman has also said something similar.