Quoted in Kobets, Svitlana, "Foolishness in Christ: East vs. West", Canadian-American Slavic Studies, vol. 34, no. 3, Fall 2000, pp. 337–363. Kobets writes of Surin: "During one particularly difficult session of exorcism his psychic health was seriously damaged. His ensuing mental condition has been diagnosed post factum as catatonic schizophrenia."
