Macros live in the land of the names, not the land of the things they refer to.
The Arc(Lisp) tutorial.
LISP has been jokingly described as “the most intelligent way to misuse a computer”. I think that description a great compliment because it transmits the full flavor of liberation: it has assisted a number of our most gifted fellow humans in thinking previously impossible thoughts.
Edsger W. Dijkstra, 1972 Turing Award Lecture, Communications of the ACM 15, October 1972.