If you liken depression to a headache, it demonstrates we're not talking about the same thing. Depression is not the same as sadness. Analogies only take us so

If you liken depression to a headache, it demonstrates we're not talking about the same thing. Depression is not the same as sadness. Analogies only take us so far, but a far better one would be physical pain so severe that, like severely depressed patients, the victims want to kill themselves to end it. Think torture, which is often how depressed patients describe their own intrusive thoughts.