How does Sai Baba's philosophy connect a devotee's personal effort with receiving divine grace?

Chapter 19 explains this connection through the principle of 'As the action, so the hearing; as the practice, so the benefit.' This concept, described as the nectar of the chapter's teaching, places the responsibility on the devotee's actions. It references the Bhagavad Gita's wisdom, 'Ye yatha mam' (As they approach me...), highlighting that the divine response is commensurate with one's approach. Sai Baba uses a powerful analogy, telling the devotee, 'You start doing the exercises (Zor); leave the worry about milk entirely to me; I am standing behind you with a bowl.' This illustrates that while the devotee must put in sincere effort (the exercises), the Guru provides the nourishment and ultimate well-being (the milk), ensuring the security ('Yogakshema') of those who are constantly united with Him.