What Is The Difference Between The Possessed And The Mentally Ill?

Father Cipriano de Meo, who has been an exorcist since 1952, told CNA’s Italian agency ACI Stampa that typically, a person is not possessed but is struggling with some other illness.

The key to telling the difference, he said, is through discernment in prayer on the part of the exorcist and the possessed - and in the potentially possessed person’s reaction to the exorcist himself and the prayers being said. 

Full Article