The clojure source code is not a good example, in my opinion. Much of it is written in a subset of clojure, since it builds itself up bit by bit and much of it

The clojure source code is not a good example, in my opinion. Much of it is written in a subset of clojure, since it builds itself up bit by bit and much of it is highly-optimised clojure code. I consider myself very proficient in clojure, yet I struggle reading clojure cores’s code.