*searching for a metaphor*

ummmm.."irrationality is like mowing your lawn blindfolded, from memory...you may eventually get the lawn cut, but you may go thru the flower beds and use way more fuel than needed."

Kinda weak? Well, I'll just say that I have spent most of my life taming my irrational side and allowing it only limited freedom when it is merely entertaining, and not endangering the flowers.