The best way I can think of to describe depression is that it's kind of like a fluffy cloud that surrounds your entire being. No one can see it or feel it, but it's always there. Sometimes it's as thick as molasses and no one can reach through it. Other times it's like a thin mist and even you forget it's there. But it is there, just on the edge of your peripheral vision, waiting to make its presence know when you least expect it. A bit like Jaws.