What is considered the most effective way to perform Guru service through writing, and why are poetic biographies preferred?

According to the preface in Chapter 0, the best and most certain form of written Guru service that grants salvation is to write the biography of one's Sadguru. This should be done with a firm resolve, pure heart, excellent faith, and unwavering devotion. The text further explains that for regular study, recitation, Parayans, and Saptahs, detailed poetic biographies are most suitable. The reason given is that poetry is memorized quickly and easily, stays in the memory, and can be recalled when needed. This is contrasted with prose, which is difficult to memorize, making poetic forms superior for these spiritual practices as described in Chapter 0.