It is often said that a person experiencing the first stages of serious schizophrenia is more likely to go to see a priest than a psychiatrist1. This is because the delusions suffered by people with schizophrenia often have a religious content. Sufferers may believe that they are a saint, a prophet or God himself, (which is more common in men), or (in women) that they are a saint or are pregnant with the Messiah.
Sometimes the person may believe that they are being punished for some unforgivable sin that they have committed earlier in their life or that they are damned to everlasting hell. This can lead to feelings of intense despondency. In other cases the sufferer may believe that others around them are devils or witches and may attack them or that they themselves are possessed by devils.
There is an amusing story from the 1980s of two patients meeting for the first time on a psychiatric ward who, after telling each other their story immediately fell into an altercation with one patient accusing the other of being an imposter: “how can you be Jesus Christ?” he said,"I am Christ."
How common are religious delusions in schizophrenia?
Various studies have found that the prevalence of religious delusions in schizophrenia is very high. Torrey in the US, for instance, has suggested that around half of sufferers there experience religious delusions. Other studies in other parts of the world have found differently. Mohr and Huguelet in Switzerland found the prevalence to be around 21% (this was probably representative of the overall prevalence in Western Europe) and Rudaleviciene and his colleagues in Lithuania found it to be as high as 64% there.
Whatever the figures may be for an individual country it is clearly a trait that is very common in schizophrenia and psychiatrists encounter it so frequently that they have come up with a name for it: religiosity or religious preoccupation. Religiosity is definitely not new. The early psychiatrists in the 19th century observed the phenomenon although it was not thought to be quite as common then as now.