There is nothing to be learned from the second kick of a mule, even in podcasting

Today's quote is an old axiom about learning lessons the first time

There is nothing to be learned from the second kick of a mule.

The idea being there is some value in the first kick or mistake. But getting kicked a second time or making the same mistake twice is foolish and offers nothing that you couldn't have learned from the first time you got kicked or made the mistake.

The quote was recently used by Dick Armey in an Op-Ed piece in USA Today. I like the saying but I don't think it is an appropriate lead-in for Armey's argument for a flat income tax.