MPD(DID) is very real if for no other reason than the Bible says so-- A double minded man is unstable in all his ways. This is the root of the problem more often than not-- traumatically induced MPD. Psychotropic drugs are part of the problem as they keep the mind together only in an artificial sense.
God has given us a wonder drug to treat MPD and other forms of mental illness-- MJ.
there is no mental illness because the bible told me so?
anyway....the one thing I often see is drugs/alcohol, but the question often times is, what came first? Some people self medicate problems with substances, but may not have started with them.....sadly, they add to the problem.....
your biblical quote refers to people that are going from one thing to another, extremes, often like Raoul when he first got here, though seems to be stabilizing a bit now (sex is bad, no its not, well maybe,etc...lests not go there really, again)....schizophrenics would not meet that scripture qoute, theirs is not a willing double minded....