What is the primary virtue discussed in Chapter 38 of Sai Satcharitra, and why is it considered so important?

Chapter 38 of the Sai Satcharitra extols the supreme virtue of food donation, known as Annadan. It is presented as the highest secret for quenching hunger and the foremost among all deeds, particularly for the current Kali age. The chapter explains its importance by stating that food is the very form of Para-Brahman (the Supreme Reality), from which all beings are born and by which they are sustained. As mentioned in Chapter 38, the author emphasizes that while other forms of charity might require consideration, food donation should be given without hesitation to anyone who arrives at your door. This practice is considered so fundamental that other donations are deemed incomplete without it, much like a necklace without its pendant.