I suspect a lot of the magic will fall away after realizing the block data structure (the square brackets) are pretty close to a Lisp list. And just like in Lisp, they're used for both code and data. One big difference is words are evaluated by default instead of just the first word in a list, so there's nowhere near as much nesting, and whenever an expression ends the next one can begin with no delimiter (but use newlines for legibility).