Why does the preface argue that poetic biographies are better than prose for spiritual study?

The preface strongly advocates for detailed poetic biographies over prose for several practical and traditional reasons. According to the insights in Chapter 0, poetry is much easier to memorize and stays in the memory longer, allowing it to be recalled when needed. This is contrasted with prose, which is described as difficult to memorize. The author points to the fact that ancient Sanskrit literature is mostly in verse as evidence of this principle. Since the goal of these biographies is not just to be read once, but to be used for regular study, recitation, Parayans, and Saptahs, the memorability and rhythmic nature of poetry make it the most suitable format for this kind of devotional Guru service.