According to Chapter 10, why is it so important to have faith in a Sadguru like Sai Baba?

According to Chapter 10 of the Shri Sai Satcharitra, placing faith in a Sadguru is paramount because the Guru is described as the one eternal God, while all other gods are considered illusory. The text explains that through the service of the Sadguru, the cycle of worldly existence (Samsara) is completely destroyed without the need for intellectual struggles. A Sadguru like Sai Baba acts as a boatman, helping devotees cross the 'ocean of existence.' By placing faith in His feet, He can even change one's fate, a concept described as 'striking a nail over the lines of destiny.'