In the 4th line, the Old Mariner is the person who appears in the poem, "The Rime of the Ancient Mariner" written by the English poet Samuel Taylor Coleridge. He kills an innocent albatross and the curse of the Almighty befalls upon all the sailors. Later on, he truly feels that he has committed a great mistake by killing the bird; however, he is forgiven at the end of the day. Thus, he decides to share his own sweet and the bad memories, related to that incident, with other people so that they can learn the focal lesson- "He prayeth best, who loveth best..."
