James Gosling, in a weblog entry on the proposal to add closures to the Java language, dubs his Black Hole Theory of Design:
“Lisp is a Black Hole: if you try to design something that’s not Lisp, but like Lisp, you’ll find that the gravitational forces on the design will suck it into the Black Hole, and it will become Lisp”
Compare to Greenspun’s Tenth Rule of Programming (1993):
“Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp.”
Which quote you use will depend on your perspective, I suppose.