How does Chapter 50 differentiate between a worldly father and a Sadguru as a 'progenitor'?

Chapter 50 presents a profound distinction between a worldly father and a Sadguru. The text explains that a worldly father provides the physical body by placing a seed in the womb, a process described as birth 'through the yoni.' In stark contrast, the chapter elevates the Sadguru to an 'extraordinary progenitor.' The Sadguru gives a spiritual birth to his disciple 'without spending a drop of seed, without the lower birth canal.' This rebirth happens through the granting of full initiation, or Anugraha. This spiritual genesis, as conveyed in Chapter 50, is what ultimately frees the disciple from the cycle of birth and death, a power the worldly father does not possess.