A year-old New York Times Magazine piece takes some time to look at anxiety.
ANXIETY IS NOT fear, exactly, because fear is focused on something right in front of you, a real and objective danger. It is instead a kind of fear gone wild, a generalized sense of dread about something out there that seems menacing — but that in truth is not menacing, and may not even be out there. If you’re anxious, you find it difficult to talk yourself out of this foreboding; you become trapped in an endless loop of what-ifs.