I take the front seat on roller coasters.  I quit jobs when they get boring.  I eat sea urchin and raw oysters.  I put my thoughts out there on this blog and other places. I’m not one who is afraid to take risks. I give talks about courage and fear.    If I do all of these things, why is it that there are days when fear seems to come over me like a wave? It’s not the kind of fear…