As a monk in disobedience to his superior, Nicetas left the monastery and closed himself in a cell. Because of his disobedience, God permitted great temptations to befall him. Once, when Nicetas was at prayer, the devil appeared to him under the guise of a radiant angel and said to him: "Do not pray anymore, but rather read books and I will pray for you!" Nicetas obeyed, ceased to pray, and began to read books. He only read the Old Testament. He was unable to open the New Testament, for the power of the devil prevented him from doing so. With the help of the devil, Nicetas prophesied—but only about crimes, thefts, arson, and other evil deeds which are known to the devil and in which he participates. Finally the holy fathers of the Caves [of Kiev] realized that Nicetas had fallen into demonic delusion, and they began to pray to God for him. Nicetas returned to the monastery, realized the state of ruin he was in, repented bitterly over his disobedience and pride, and directed himself on the right path. After prolonged repentance and many tears, God forgave him and bestowed upon him the gift of miracle-working. He reposed in the year 1108.

— The Prologue of Ohrid by St. Nikolai Velimirovic (Page 129 - 130)