From a practical standpoint, why are poetic biographies preferred over prose for devotional practices like Parayans, and how does this connect to maintaining unwavering devotion?

The source material provides a very practical reason for preferring poetic biographies for devotional study. As stated in Chapter 0, there is no established tradition of performing Parayans or Saptahs with prose biographies because prose is difficult to memorize. In contrast, poetry is memorized 'quickly and easily, stays in the memory, and is recalled in time.' This ease of recall is crucial for maintaining a constant connection to the Guru's teachings, which supports the practice of unwavering devotion. The ability to easily bring the Guru's life and lessons to mind through memorized verse is why the study of poetic Guru biographies is considered the best way to perform Guru service.