[didibus]

All the languages you've mentioned will also expand your brain, but in a different direction, mostly related to correctness and provability of specifications.

Clojure will expand it in different ways. Here's some examples:

  - Interactive programming
  - Persistent data structures
  - Immutability
  - Code that writes code
  - Functional programming 
  - Extendable polymorphism
  - Lazy evaluation
  - Eager evaluation
  - Parallel computing
  - Dynamic variable extent
  - Recursion
  - Concurrent programming
  - Declarative programming
  - Aspect oriented programming
  - Logic programming
  - Code as data
  - Software transactional memory
  - Generative testing
  - Contracts guards
  - Optional type systems
  - Conditional restarts
  - Monads
  - Variant types
  - Collection abstractions
  - Array programming
  - Map Reduce
  - List comprehensions
  - Reactive programming
  - And more...