The title of the thread bothers me for some reason -- it makes him sound like he's got schizophrenia or some kind of serious mental illness. Anytime I've heard someone say that a person has "mental issues", they aren't phrasing it that way to be polite.
That said, I agree with Countess. Depression IS a mental illness and needs treatment -- usually some combination of a neurotropic and therapy. Neurotropic meaning something related to the neurons in the brain (chemical) as opposed to psychotropic which would deal with things like hallucinations, voices, delusions....symptoms of other, more serious illnesses. Depression can even affect the body in a physical manner, causing aches and pains, fatigue, loss of appetite, etc. No one wants to be depressed. It's more than just being sad or feeling "blah" or being down. Everyone has days where they just feel like crap. That's not depression and making it sound like that completely trivializes it.
"The grass was greener / The light was brighter / The taste was sweeter / The nights of wonder / With friends surrounded / The dawn mist glowing / The water flowing / The endless river / Forever and ever........ "