I've been standing on the edge for the past few days...the edge of space between cultures, the edge of spirit between faiths, the edge of history at a time when the whole world changed (a couple of times).  I just returned from 5 days in Istanbul. Oh, yes, I've heard (and made) the jokes about spending Turkey Day in Turkey.  And frankly, I wasn't really certain about why I wanted to go to Istanbul until I returned home (so typical).  But truth be told, no description, no guide book or digital slide show can tell you the power of  the place.  You just have to be there. How could I know…