Can you explain the philosophical ideas about Sai's grace and the law of Karma discussed in Chapter 47?

Chapter 47 begins by extolling the power of Shri Sai's grace, describing his face as an abode of supreme bliss that can destroy the sorrows of infinite births. It states that his merciful glance can immediately liberate devotees from the bonds of Karma and make the complications of actions and non-actions vanish. Later in the chapter, a contrast is made by stating that the law of Karma is very deep and difficult for anyone to comprehend, so much so that even the highly learned are deceived. However, it provides reassurance by concluding that the ignorant but faithful are ultimately saved by their devotion, as referenced in Chapter 47.