For some people, depression seems to descend on them, from outside, because of some sad events, or because of some neurological blip. It isn't them it is something that happens to them.
But for other people it is just there, always, just what they are.
For the second kind of person, how can you say that they are not just bad, or lazy, or pathetic, or weak? I mean, how can I say that? When I repeatedly fail to get things done, or get stressed and irritable and negative with the children?