I'm astonished that Fowler presents a central LISP idea here, without even mentioning LISP by its name, let alone mentioning that this is building something tha

I'm astonished that Fowler presents a central LISP idea here, without even mentioning LISP by its name, let alone mentioning that this is building something that a LISP system gives you for free. (i.e. in LISP you could take the quotation of your code directly as data structure, and even have an interpreter for that right now.)