I graduated from college in 1986 (barely) and spent the next 8 years tracking Bigfoot in the Olypus Range of Northwest Washington State.  After that it was off to Crocodile Wrestling in the Outback.  Strength is my mind's inability to recognize pain, fatigue or even myself.  Weakness is a fear of the dark and sandals.  Thank God I don't have to ride at night in sandals!