The Monk Nicetas the Confessor, hegumen of the Medikion monastery, was born in Bithynian Caesarea (northwest Asia Minor) of a pious family. His mother died eight days after his birth, and his father, named Philaret, was tonsured into monasticism. The infant remained in the care of his grandmother, who raised him in a true Christian spirit. From his youthful years Saint Nicetas attended in church and was an obedient of the hermit Stephanos. With his blessing Saint Nicetas set off to the Medikion monastery, where the hegumen then was Saint Nicephoros.
After seven years of virtuous life at the monastery, famed for its strict custom, the Monk Nicetas was ordained presbyter. And the Monk Nicephoros, knowing the holy life of the young monk, entrusted to him the guidance of the monastery when he himself became grievously ill.
Not wanting power, the Monk Nicetas began to concern himself about the enlightening and welfare of the monastery. He guided the brethren by his own personal example of strict monastic life. Soon the fame of the lofty life of its inhabitants of the monastery attracted there many, seeking after salvation. And after several years the number of monks had increased to a hundred men.
When the Monk Nicephoros expired to the Lord in his extreme old age, the brethren unanimously chose the Monk Nicetas as hegumen.
The Lord vouchsafed Saint Nicetas the gift of wonderworking. Through his prayer a deaf-mute lad was restored the gift of speech; two demon-possessed women received healing; he restored reason to one who had lost his mind, and many others of the sick were healed of their infirmities.
During these years under the emperor Leo the Armenian (813-820), the Iconoclast heresy resumed and the oppression over holy icons intensified. Orthodox bishops were deposed and banished. At Constantinople in 815 a council of heretics was convened, at which they dethroned the holy Patriarch Nicephoros (806-815, +828), and in his place they chose the heretical layman Theodotos. In place of exiled and imprisoned Orthodox bishops they likewise installed heretics. The emperor summoned before him all the heads of the monasteries and tried to draw them over to the Iconoclast heresy. Among those summoned was also the Monk Nicetas, who stood firmly for the Orthodox confession. On his example all the hegumens remained faithful to the veneration of holy icons. For this he was thrown in prison. The Monk Nicetas bravely underwent all the tribulations and encouraged firmness of spirit in the other prisoners.
Then the emperor and the false-patriarch Theodotos attempted to trick with cunning those that persisted. They explained to them that the emperor would give them all their freedom and permit the veneration to the icons on one condition: if they would take Communion from the pseudo-patriarch Theodotos. For a long time the monk had doubts, whether he should enter into church communion with an heretic, but others of the prisoners besought him to partake together with them. Acceding to their entreaties, the Monk Nicetas went into the church, where for the deception of the confessors icons were set out, and he accepted Communion. But when he returned to his monastery and saw, that the persecution against icons was continuing, he then repented of his deed, returned to Constantinople and began fearlessly to denounce the Iconoclast heresy. All threats from the emperor were ignored by him. The Monk Nicetas was again locked up in prison, where he spent six years, until the death of the emperor Leo the Armenian. And there, enduring hunger and travail, the Monk Nicetas by the power of his prayers worked miracles: through his prayer the Phrygian ruler released two captives without ransom; three men for whom the Monk Nikita prayed, who had suffered shipwreck, were delivered up on shore by the waves. In the year 824 under the new emperor Michael (820-829), the Monk Nicetas expired to the Lord. The body of the monk was buried at the monastery with reverence. Afterwards, his relics became a source of healing for those coming to venerate the holy confessor.