When you consider Jesus' language is consistant of that day:
Description
Language Used
Diagnosis of the day
Matt. 12:22
"possessed with a devil {demon}"
blind and dumb
Mark 5:1,2,3,4,5
"a man with an unclean spirit"
insanity,schizophrenia?
Mark 9:17,18,19,20,21,22,23,24,25,26,27
"hath a dumb spirit"
epilepsy
Luke 13:11,12,13,14,15,16,17
"spirit of infirmity"
arthritis
John 10:20; Mark 3:21 where "he hath a devil and is mad" means "he is beside himself."
Patients today show the same symptoms as those said to be possessed with demons in New Testament times.
How can the patient's who recover with assitence of medicine and therapy be explained today?
Are you suggesting pills cast out demons?
And to prove without any doubt your theory is incorrect take careful note of what happened when Legion was cured.
How is Legion described?
"clothed and in his right mind." (Mark 5:15).
This implies that his affliction was insanity and not some other evil source.
Insight