Серафим Саровский
Schema-archimandrite Abraham (Reidman) reminisces about his youth, when he did not pray with the Jesus Prayer, did not know any experienced elders, and did not read the books of the Holy Fathers. He read for the first time the conversation of St. Seraphim of Sarov with Motovilov, but understood it in a primitive way and began to pray about acquisition of grace. As a result, he began to see visions from demons. Fortunately, later he came to his senses and realized that he was in delusion.