I had this experience, too, years ago. I felt like my brain was getting rewired. I loved it. I also noticed that I was thinking in Lisp relatively quickly. To t

I had this experience, too, years ago. I felt like my brain was getting rewired. I loved it. I also noticed that I was thinking in Lisp relatively quickly. To this day when I have a really hard problem I want to solve I write the code in Lisp because it makes hard things easier to understand. Then I implement it in the language I'm using. You begin thinking "naturally" in Lisp because there's no syntax to memorize, it's all data and / or semantics. You can literally write the code in your head. Languages I've used for years and years don't do this to me like Lisp does. It also made me feel more confident about programming in other languages and not to get distracted by "fancy" syntax or features that are just warmed over scraps from the floor of Lisp's feast on the table.