How does Sai Baba advise a devotee to approach their spiritual practice, and what is the devotee's responsibility in receiving grace?

According to Chapter 19, a devotee's progress is directly linked to their efforts. The text emphasizes the principle 'As the action, so the hearing; as the practice, so the benefit.' This concept is illustrated by Sai Baba's analogy where He tells the devotee, 'You start doing the exercises (Zor); leave the worry about milk entirely to me.' This means the devotee is responsible for putting in the spiritual work and being alert. One cannot expect the Guru to do the exercises while the disciple drains the cups of milk. Those who live by these authoritative words and take responsibility for their practice will find the 'mine of happiness in this world and the next.'