What is considered the best way to serve a Guru through writing, and why is poetry preferred for this service?

The source explains that the best and most certain service in writing that leads to salvation is to write the biography of one's Sadguru. This involves not just writing but also personal, regular study through practices like Parayans (hundreds of readings) and Saptahs (weekly recitations). As detailed in Chapter 0, this service should be done with a pure heart, firm resolve, and unwavering devotion. For these devotional studies, detailed poetic biographies are considered most suitable. The text clarifies that poetry is much easier to memorize than prose, stays in the memory longer, and can be recalled when needed, which is why this format is traditionally preferred for Guru biographies intended for deep study.