I think we only have to look at this thread to see that there are so many different beliefs, attitudes etc about the origins/treatment of depression. I have read so much (too much) really about depression, ranging from psychiatrists who do not believe there is any evidence supporting the notion of change in brain chemistry in depression (which is what my therapist believed) which she called the psychologogist model and scoffed at the medical model. I have read others who are fairly and squarely in the medical model, and yet others who think in terms of the combination of the two. I read a book called "The Manufacture of Depression" which is written by a sufferer whose emphasis was on the fact that the huge profits that were being made by the drug companies.
Likewise I have had the basics of CBT explained to me by my CPN - I had the psycho-dynamic model of which I have spoken in another thread, and a CAT therapist (Cognitive Analytical Theory) a supposed combination of CBT and more deeper analytical theory. Now I have a clinical psychologist who is ver nice and free cus it's on the NHS. However she (nor anyone else) can throw any light on why I get so many "blips" (lasting between 2 and 7 days) and I am well for approx 60/70% of the month, sometimes better, sometimes worth. No one seems to be able to believe that these blips come out of the blue. They all want to relate them to some trigger, and I have to listen to my nice therapist and some close friends, saying what they think my latest blip is related to..........aaaaaaaaaaaaaargh. It drives me mad (sorry bad choice of word there) I wish I did know the trigger, so that I could stop doing whatever it is that is causing the blips or start doing something to stop them.
The only person who told me that these blips were to be expected was the consultant psychiatrist (but needless to say he was glued into the medical model) when asked if they eventually went away, he replied "sometimes, and sometimes not, you have to work around them." I suspect he was right. These blips/dips whatever have been going on for over 2 years and I am not reliable - I can't control my life - can't book a holiday or arrange to care for my grandchildren. Sorry I know I am moaning - and playing "poor me" when there are so many thousands of people who are far worse off than me.
I suppose all I can say is that no-one really knows the orgins of brain disorder - it's all trial and error and different remedies working differently on individuals. Obviously if something (meds or therapy or combination of both) bring relief for people, they will have a justifiable belief that this could be the way forward, but for me I reckon what the psych said is about right and I have to acknowledge that this is how it will be for me, though of course I might eventually recover.
Sorry I am just rambling a bit, but have had a horrendous day and am just (now it's time for bed) starting to feel vaguely human again.