Reading the chapter in "Seven More Languages in Seven Weeks" about #elm and realizing that learning #scheme was not only a good thing but is like learning the master key to understanding the universe.
I thought the platitudes about learning Lisp were just hyperbole, but it seriously contains a lot of computer science mindshare.
@craigmaloney I wish Lisp was still taught at the university level as an introductory course. At my university we had 2 OOP courses which weren't so much "object oriented" as "Java syntax" courses. We got simplistic definitions and syntax but no real guidance on how to use any of the concepts. Two entire courses! But you can learn everything there is to know about Lisp syntax in like, 10 minutes? If you're going slow? 20 max? And then you can actually start learning how to program!