Donkey Laugh
A few mottoes:

      My mind is made up, don't confuse me with facts.
      Don't make a mental note if you've nothing to write on.
      Measure with a micrometer, mark with chalk, cut with an axe.

This describes John's mental state, now that he's retired:

I'm lost.
I've gone to look for myself.
If I should get back before I return,
please ask me to wait.