> Once you've toiled on the learning curve of Lisp long enough to really grok it you might begin to think you've discovered the foundational bedrock of the universe.
Could it be a form of self-selection bias? That the kind of person that is likely to have such thoughts about a (family of) programming language is also more likely to start and preservere with Lisp?
That quote is referring to Lisp’s foundations being essentially a mathematical model that is equivalent to the lambda calculus, which can be shown to be capable of expressing any computation possible. It’s a parallel to the Turing machine, see the Church-Turing Thesis. This makes the language, like mathematics, feel less invented by a human and more like discovered, as if it was some law of the universe.