Can you elaborate on the transformative power of chanting Rama's name, using the example of Walya the fisherman?

Chapter 19 describes the immense transformative power of chanting the name of Rama, highlighting how it can purify even the fallen. The text explains that one can attain the 'true form' through this practice. A powerful example provided is that of Walya, a Koli (fisherman) who was a highway robber. By chanting the two syllables of 'Rama' in reverse as 'Mara Mara,' the name 'Rama' eventually appeared on his tongue. This act of repetition redeemed him, transforming him into the great sage Valmiki, who miraculously authored the story of Rama's life even before Rama was born. This illustrates how the name of Rama brings deep gain and purifies the fallen.