[alasdair_]

> >What is the difference between being depressed and "feeling" depressed? >What is the difference between being schizophrenic and having the "opinion" that Satan speaks to you through your neighbor's cat? >Mental illness is defined by what a person feels and believes.

Honestly, a lot of the time it comes down to observable impact. If a patient comes to a doctor and says that they feel depressed, that's one thing, if they have lost their third job this year because they can't do anything but lie in bed and seem to not care about their own lives (especially if they used to not be like this in the past) that's something else.