St. Peter was one of Jesus's disciples. Jesus told him that he is going to deny knowing Jesus three times. Peter said he would always stand by Jesus and so didn't believe him. When the time came and Peter was asked if he was a follower of Jesus, Peter denied it for fear of his own life. Peter continued to deny knowing Jesus a further two times just as Jesus had said he would. After Jesus's death Peter was filled with the holy spirit and continued to spread the word of Jesus's life.