Why are poetic biographies considered more suitable for Guru service than prose, and how does this relate to ancient traditions?

Chapter 0 explains that for the purpose of study, recitation, Parayan, or Saptah, detailed poetic biographies are the most suitable form of Guru service. The primary reason given is that prose is difficult to memorize. In contrast, poetry is memorized quickly and easily, remains in the memory, and can be recalled when needed. The text suggests this is why ancient Sanskrit literature is predominantly in verse. This preference for poetry in devotional practice is part of a universal custom, aligning with the ancient tradition of performing Parayans and Saptahs, which dates back to the Vedic era for great works like the Vedas and Ramayana.