How do the concepts of personal effort and divine grace interact in a devotee's spiritual journey?

In the teachings from Chapter 19, personal effort and divine grace are presented as cooperative forces. A devotee is instructed, "You start doing the exercises (Zor); leave the worry about milk entirely to me." This metaphor powerfully illustrates that the devotee must initiate and perform the work, while trusting the Guru to provide the results and support. The principle is that benefit is directly related to practice. However, grace is always present. The text mentions that for those who think of the Lord with "undivided attention," He personally provides their well-being and security. Thus, a devotee's role is to put in the sincere effort with a surrendered heart, which then allows the Guru's grace to flow and bear fruit.