Baba uses the analogy of a stone and a gem being polished. What is he trying to teach about the role of a Guru and the nature of a disciple?

In Chapter 19, Baba's analogy of a stone and a gem on a whetstone explains the dynamic between a Guru's guidance and a disciple's readiness. Although the polishing process is the same for both, the outcome differs based on inherent quality: "the stone remains a stone, but the gem becomes a brilliant jewel." This illustrates that while a Guru provides the opportunity for refinement, the disciple's inner potential and wisdom are crucial. The Guru expects "strong faith at the Guru’s feet and the strength of courage which is patience." The analogy suggests that a disciple must possess the innate qualities of a 'gem' to fully absorb the Guru's grace and achieve true spiritual brilliance.