Is the glass half full or half empty?  That is the proverbial question.

My dad raised me to be a contrary thinker.  When the stock market has been going up for three or four years he’ll say, “Be careful.  Nothing goes up forever.”  This is why, for me, the glass is not half full.  But it’s not half empty either.  It’s just a symbol.  There is no real glass.  Your perceptions are in your mind, not in the glass.

This brings me to my favorite quotation which is from Shakespeare’s Hamlet.  “There...