Lisp "as the idea" is not a programming language. Racket is a language, Common Lisp* is a language. No one writes code in the IDEA of lisp, indeed no one can because no computer yet can pull instructions out of what ever aether contains platonic ideals.

* using SBCL: (defun foo (x y) (...)) instead of Racket (define (foo x y) (...)) is again an example of syntax.