According to the teachings in Chapter 21, why is divine grace considered essential for attaining the company of saints?

Chapter 21 strongly emphasizes that attaining the company of Saints is not a matter of personal effort or proximity alone, but is contingent upon divine grace. The text explicitly states that this union is "not accessible to the unfortunate" and is "easy only when God’s grace is present." The author uses his own past as an example, where he failed to visit the saint Pir Maulana despite being in the same city, which he attributes to ill-luck. As Chapter 21 makes clear, it was only when the right time came, implying the dawn of good fortune, that an "unbreakable bond" with Shirdi was formed, reinforcing the idea that grace is the prerequisite for such a sacred association.