I like what Rohag said on this one...

as far as I agree or disagree with it...
I think depressed people get down on themselves WAYYY too much for small mistakes they've made. I do it all the time. Feelings of worthlessness is one thing that we all have to work on, I think. We can't get about our day if we're wallowing in self guilt and can't stand up for ourselves.

However, I do think that some depressions have medical causes and NEED medication to get started on the path to recovery at the very least. So completely discounting the use of meds, well I can't support that either