Ahhh... now it comes together. Thank you so much.

so here's a quick revision of my understanding:

I'm gonna call the 'the current class' selfClass.

1)
class Klass
  <-- self is Klass
  <-- selfClass is also Klass
end

2)
def myMethod; end  <-- creates myMethod(), callable by selfClass.new

3)
obj.instance_eval  <-- sets self to obj, sets selfClass to obj's 
metaclass

4)
obj.class_eval <-- sets self to obj, AND sets selfClass to obj

5)
include myModule <-- evaluates the instructions in myModule, underneath 
selfClass

6)
extend myModule <-- evaluates the instructions in myModule, underneath 
self

Does that seem correct now? Thanks for your help by the way. That's 
quite a bit more clear now.
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