What is the relationship between a devotee's personal effort and the Guru's support as described in the text?

Chapter 19 illustrates the relationship between effort and grace with a clear analogy: a devotee is told, "You start doing the exercises (Zor); leave the worry about milk entirely to me; I am standing behind you with a bowl." This means a devotee must be alert and committed to their spiritual practice. The text explicitly states, "as the practice, so the benefit." One cannot expect the Guru's support (the milk) without putting in the personal effort (the exercises). Those who live by these authoritative words are said to find a "mine of happiness," understanding that their sincere, active participation is what attracts the Guru's grace and provision.