Episcopate and Struggle Against Heresy
The synaxarion remembers John for his struggle against the Eutychian (Monophysite) heresy, alongside his recognized gifts of discernment and wonderworking. By his own life's account he was raised from monk to Bishop of Caesarea in Palestine, but resigned the office to return to the monastic community.
Scholarly sources disagree on the dating of his episcopate: one tradition places it around 516, while the OCA synaxarion gives 587–596. The discrepancy may reflect differing scholarly traditions or a possible conflation of two persons, and is noted here for clergy review; the saint is consistently assigned to the Byzantine period and the broad span of the 6th century.