 Theoctistus, also spelled Theoktistos, aka the Venerable Theoctistus of Palestine, was an associate of Euthymius.He was an ascetic who lived in a nearby cell at the Pharan lavra.About five years after Euthymius arrived, they went into the desert for Great Lent, and found in a wadi a large cave where they remained praying in solitude for some time.