Close your eyes and picture an angel. Now open them again so you can read the rest of this blog. What did you imagine? I’m guessing a woman wearing a long floaty white dress, effortlessly hovering in the sky (though mysteriously not beating her wings), with a halo atop her long blonde hair and maybe strumming a harp.   Was I right? It is no coincidence that our imagined angels conform to the same stereotypes. In 2008, 55% of Americans, 67% of Canadians and 38% of Britons professed their belief in the existence of guardian angels, and for many they take the “classical” form (human appearance, exceedingly beautiful and blindingly…