I didn't have time to read the whole thread, except for a couple of posts (mainly hyena's). I'm not sure what i'm supposed to reply to. It's definitely an interesting topic. For starters i'll say a couple of things, and i'm willing to try to reply to any further questions.
So, what is mental health? What is health?
According to the World Health Organization, "Health is a state of complete physical, mental and social well-being, and not merely the absence of disease". Which means that mental health could be defined as "a state of emotional well-being, in which the person is able to live and work with ease within the community and to get satisfied by his/her personal characteristics and accomplishments".
On the other hand there's certain criteria that can be used in order to label someone as mentally healthy or not, such as the clinical criterion (according to which mentally healthy is someone who doesn't suffer from a mental disorder), the criterion of the ideal functionality (which is utopical), the statistical criterion (which is more mathematical and could label as abnormal positive qualities as well), the developmental criterion (smooth moving from one stage of psychological development to the next), the social criterion (functionality in relation to the community) and the subjective criterion (how each person feels).
As you can see, defining someone as mentally ill or healthy is not very easy. All of the above criteria should be taken into account when trying to assess someone's mental state. And there will still be grey areas.
As for depression, i'm not too well versed on it yet, but i can say it's an illness. Of course it should be diagnosed and not confused with mere sadness, which is a normal feeling that we all go through.
Regarding help vs. scolding where mental disorders are involved, people should definitely be helped and not scolded.
As for what rahvin said:
I can predict there will form two sides: A, people who say alterations of the functions in the brain are always a medical condition and should be treated with medicine alone; B, people who claim other factors (like force of will or strength of character) play a role and should be called upon to overcome difficulties. Personally, I don't know but I'm convinced everybody ought to make a serious effort to believe in B even if it's actually A.
i have to say that those points of view can be reconciled. Modern psychiatry tends towards the bio-psycho-social model, which means there's a biological, a psychological and a psychosocial component to the genesis of mental illnesses. 'Biological' refers to genetics, neurochemistry, psychopharmacology and neuro-imaging, 'psychological' refers to the psychanalytical, behavioral etc theories, and 'psychosocial' refers to the stressful life events and the role of family and the presence or absence of a net of social support. Treatment should involve all the above factors, ie it should be a combination of medication, psychotherapy and social support.
@hyena: i'm sorry i didn't see this topic earlier, i hope this helps a bit.