Describe depression if you can

Depression, when it is present, is more like the force of gravity. It is there, pulling down on you under all circumstances. Though I'm depressed I am often very happy- but still there is the unfeeling wet blanket of muddled confusion and writhing frustration seething under it all. Waiting.

A creeping numbness that insidiously degrades and diminishes every aspect of conscious life. A storm of screaming and hatred in dreams. A dull apathy in waking. A sinking stomach in the face of joy and a faithless lassitude in the face of hope.
Depression isn't an emotion. Depression is a contradiction to every worthy aspect of life.