What fundamental requirement does Chapter 21 say is necessary for a person to get the opportunity to meet a Saint?

The central teaching in Chapter 21 regarding meeting a Saint is that it is not something one can achieve through simple effort or proximity; it requires divine arrangement. The text explicitly states, "Unless good fortune dawns, One does not encounter Saints and Sages." It reinforces this by noting that this company of Saints is not accessible to the unfortunate and that the union is easy only when God’s grace is present. The author uses his own past experience as proof, describing how even though he lived near the Siddha Pir Maulana, his own "ill-luck" and ego prevented him from seeking a meeting. This illustrates the core principle that divine grace and good fortune are the essential prerequisites for attaining the vision of a great soul.