This clinical study is based on data from psychotic patients with delusions characterized by the belief that they have been elected by a superior power for the execution of a special task for which they have been endowed with supernatural powers. This task is almost always redemptive in nature and has two main objectives: the attainment of universal peace (especially between Arabs and Jews) and the resurrection of the dead. Because of these characteristics, this type of psychotic patient has been called the "messianic patient." A comparison was made between fifty-seven Jewish patients and twenty Arab patients in relation to the delusional content of the psychotic picture. It was found that neither Jewish patients nor Arab Muslim patients identify with God. The author maintains that this phenomenon may be explained by the common cultural-religious basis, which does not include the transformation of God into man. The psychosis of these messianic patients does not transgress the boundaries of the religious-cultural basis, unless the identity of the patient is profoundly deteriorated.