There were signs of divine protection over him. He crossed high-running streams but arrived on the other side completely dry and had no memory of going through the water. When Oros was celebrating the Liturgy in a church once, the two people present saw the sanctuary filled with angels who descended in response to the bishop’s prayers. Oros carried a large icon of Our Lady of Czestochowa with him that he would set up on the table being used for the Liturgy in different homes. There were occasions when that icon, venerated in a dark house, shone brightly.
His Marian devotion was quite strong. He always kept a little icon of Our Lady on his person, next to a small epitrakhil that he used for confessions.
During his underground years, the young bishop fortified himself with ascetical practices. He ate only once per day, in the morning, to strengthen his soul. He kept the Holy Eucharist reserved in his room in the mountains after he began his underground life and spent hours in silent adoration and prayer. After his execution, witnesses saw the hard callouses that had formed on his knees from all his kneeling. Christ’s cross and the protection of Our Lady were the spiritual bases for his career as a clandestine missionary.
When the Soviets began pressuring priests to sign to join the Orthodox, Petro Oros firmly refused. He told the parishioners in Bilky that while he would give his body to the state as a martyr, they could never have his soul. He also predicted to the clergy, his relatives, and his helpers that he would be shot by the Chekists.