What is the power attributed to the name of Rama, and how is the story of Valmiki used as an example?

The name of Rama is described as having immense transformative and protective power. According to Chapter 19, the repetition of Rama's name can stop the cycle of birth and death, and its roaring presence causes Vishnu's Sudarshana chakra to destroy millions of obstacles. The ultimate example of this power is the story of Walya, a Koli fisherman and highway robber. By chanting "Mara Mara" in reverse, the name of Rama appeared on his tongue, and he was redeemed. This act transformed the robber Walya into the revered sage Valmiki, who went on to write the life story of Rama even before Rama was born, demonstrating the miraculous mastery over speech and destiny granted by the Name.