I’m not sure I can explain really – I would not be able to do it justice, and would be bound to omit certain things that others experience.
The best description for what I experience is broadly that it’s a set of mental, behavioural and chemical feedback loops which all combine to reinforce negative views and feelings, until they reach the ultimate conclusion that everything is pointless and/or beyond repair. I’ve learnt to break the various cycles much of the time, but it’s a horrible experience when I can’t.
The worst thing is that beyond a certain point I lose the motivation and confidence to do what I know I need to in order to stop the decline.
You’ll usually find that depressed people do not want sympathy or attention – They’ll hide it all away.