If clojure is compiled to byte-code, why is there java source for clojure?

Question

I feel like this is a noob question, but if clojure is compiled to byte code then why is there java source for the clojure lang?

Answer 1

Some axioms:

• Clojure code that one writes in Clojure is compiled to bytecode.
• Java code that one writes in Java is also compiled to bytecode.
• Some core parts of Clojure is written in Java.