> code=data This is a really good explanation, and I just want to add a small bit to it, having had to use Lisp as a primary language quite recently due to som

> code=data This is a really good explanation, and I just want to add a small bit to it, having had to use Lisp as a primary language quite recently due to some AI projects in cognitive modeling. One thing that I've found personally is that by understanding Lisp, you can essentially gain a deep understanding of every __other__ programming language. If I had the chance to do my entire Computer Science career over again, I would have learned Lisp as my first language, and then compared every other subsequent language against it. Because of the deep symmetry between code and data, it is one of the easiest languages for implementing and re-implementing programming language features on top of.