> So really, Lisp has almost no syntax at all, and a Lisp program is nothing but a big tree of actions that start at the top level and work down (sort of). I'v

> So really, Lisp has almost no syntax at all, and a Lisp program is nothing but a big tree of actions that start at the top level and work down (sort of). I've heard of it described as, "programming in the AST." You don't have to think hard about how an expression will be interpreted. In fact you can get very far with just the substitution model of eval and apply as they started off with in the SICP lectures.