Saint Isaac, the hermit of Pechersk, was a wealthy merchant from Toropets in the world. Having decided to become a monk, he distributed all his possessions and came to Saint Anthony, who accepted him into the monastery. Isaac led a strict life, wearing a hair shirt and a garment made of goat skin, shutting himself in a narrow cave where he prayed and fasted. He spent seven years in seclusion, feeding only on prosphora and water.
Once, during prayer, demons appeared to him in the guise of angels and deceitfully made him bow to one of them, after which Isaac found himself in their power. The demons mocked him, but soon disappeared. Saint Theodosius, learning of what had happened, took care of Isaac, who for a long time was mute and deaf, not tasting food. After two years, through prayers, he began to speak and regain his strength.
After the death of Theodosius, Isaac again took up a strict life, working in the monastery and helping the brethren. He showed humility and foolishness for Christ, enduring insults and beatings. Isaac also performed miracles, not fearing the demons who tried to frighten him. He overcame them, strengthened in faith and prayer.
At the end of his life, Isaac fell seriously ill and was taken to the monastery, where after eight days he departed to the Lord. His body was buried with honor in the cave where the holy fathers rest. Saint Isaac, having defeated the enemy, was deemed worthy of the heavenly Kingdom.
