According to the Satcharitra, what is the nature of a Sadguru and their teachings?

Chapter 18 of the Shri Sai Satcharitra beautifully illustrates the nature of a Sadguru. It describes the Guru as the manifest form of God, encompassing Brahma, Vishnu, and Maheshwara. The teachings are compared to monsoon rain clouds showering the water of self-bliss, which should be shared freely. The text refutes the idea that a Guru's instructions should be kept secret, stating that such notions are a 'meaningless fuss.' Baba's method was not secretive; He showed the true path to each person according to their worthiness, much like a mother affectionately gives a child medicine for their own good, fulfilling their desires in unexpected ways.