What is the relationship between a devotee's effort and the Guru's provision, as explained by Sai Baba?

The relationship between a devotee's effort and the Guru's provision is one of reciprocal action, as detailed in Chapter 19. The principle is captured in the phrase, "As the action, so the hearing; as the practice, so the benefit." Sai Baba uses a powerful analogy: He tells the devotee, "You start doing the exercises (Zor); leave the worry about milk entirely to me; I am standing behind you with a bowl." However, He clarifies that the devotee cannot expect the Guru to provide the milk if they refuse to do the exercises. This teaching, which Chapter 19 calls the secret of the chapter, is also aligned with the Bhagavad Gita's promise that God provides security (Yogakshema) for those who think of Him with undivided attention.