Using the story of Damu Anna, how does Chapter 25 define the qualities of a true Saint and the nature of their relationship with a devotee?

Chapter 25 uses the story of Damu Anna to illustrate the nature of a true Saint. It states that a Saint is one endowed with self-control, free from illusion and envy, and whose life is dedicated to blessing others. They are not tempted by worldly gains like a share in profits, as wealth is like dirt to them. The relationship with a devotee is compared to that of a mother and child; the Guru may give 'bitter medicine'—advice that is difficult to accept—but it is for the devotee's ultimate welfare. As seen with Damu Anna, the Guru is a protector who knows the future state of a devotee and wards off calamities for those who are completely surrendered, proving their love is without any expectation of gain.