What does Chapter 21 say is the prerequisite for gaining the company of Saints, and what can prevent it?

According to the teachings in Chapter 21, the company of Saints is not accessible to the unfortunate. The primary prerequisite is the dawning of good fortune and, most importantly, the presence of God’s grace; only then is this union easy to attain. Conversely, the chapter explains that ill-luck stands firmly in the way. The narrator uses his own experience of not visiting Pir Maulana as a prime example, stating, "One fears one's own shadow when ill-luck stands in the way." Therefore, Chapter 21 makes it clear that this sacred association is a matter of divine will rather than personal effort or physical proximity alone.