There's a ridiculously vast difference between "a little fucked up" and serious mental illnesses such as schizophrenia, rapid cycling bipolar disorder or borderline personality disorder.

If you think serious mental illness isn't a real, debilitating reality, I encourage you to spend some time with somebody in a truly psychotic state and see how you feel afterwards. Then imagine living as that person.

There may be no absolute "normal", but there are most certainly people who live in a sad, terrible, frightening state of mental disturbance with no simple treatment.

Don't get me wrong, I don't mean to belittle those with debilitating mental illnesses.

I simply don't like the view many seem to hold that mental illness is black and white; you have a mental illness or you don't.

> There may be no absolute "normal", but there are most certainly people who live in a sad, terrible, frightening state of mental disturbance with no simple treatment.

Agreed. There's a vast gulf between someone who is quirky on Tumblr and someone with a mental illness. It's simply not the same, not even close.

There's a significant difference between the casual DSM-reader's "everyone's got a diagnosis" and problems that lead to significant dysfunction. Even if you're only looking at the "entry level", there is a difference not only in magnitude but in kind between having the blues, or even having life-altering acute sadness, and being what a clinician would call depressed. Similarly, there's a huge difference between, say, believing in the lamed vavniks (that there are, at all times, 36 truly righteous people roaming the planet doing good — the idea being that you might be one of them, and breaking with that nature could have some nasty consequences in the hereafter) and believing that Murray next door is really the archangel Gabriel in human form. Or wondering if that cute barista is flirting with you and interpreting the name written on your cup as a love letter. We may all be a little fucked up, but only a little.

Then you don't like the world "illness" in general. The same holds for physiological health: none is completly bacteria-free, has perfect levels of vitamins, etc. However, we need to operate in our judgements with ideals (healthy; sane; circle and all other mathematical entities, etc.): reaching for them, although never succeeding; that's perfectly okay.

Oh, and we do have some quite good (attempts at) theories of what "sanity" is all about.

This has long been my opinion.

I worked with kids at a YMCA in a wealthy area, I would say 50% of them were diagnosed ADHD. I think if it's 50%, then it's just normal. 50 years ago ADHD was normal--we hadn't set our bar there yet.

But there's a world of difference between ADHD and schizophrenia.

A mental illness is a mental abnormality that significantly impacts on your quality of life or the lives of those around you. That's the definition.

Well yes, my point is that you can draw the line in any number of places. Even if we were to agree upon your definition — and there are many different, conflicting definitions of 'mental illness' — what constitutes a significant impact on quality of life?

At some point you have to draw an arbitrary line, and even then it's frequently a guessing game working out on which side of the line someone actually lies.

My definition is from the DSM and while it is true that there's always edge cases, in practice the gray area is pretty small. Especially when we're talking about serious things like schizophrenia.