I believe in a formless God and find it hard to bow to human saints. How does Chapter 35 of Sai Satcharitra address this kind of spiritual pride?

Chapter 35 of the Sai Satcharitra directly addresses the very sentiment you describe, labeling pride in one's own spiritual path as a "terrible forest" and a formidable obstacle to overcome. The chapter recounts the story of people who held similar beliefs, considering themselves "worshippers of the formless" and viewing saints with form as merely human. They questioned why they should bow or give offerings. However, the narrative in Chapter 35 serves as a lesson. These individuals, despite their firm resolve to remain aloof, found themselves completely surrendering to Sai Baba upon receiving his darshan. Their intellectual convictions and pride dissolved in the face of direct experience, suggesting that true spiritual encounter can transcend such preconceived notions and that devotion to a Guru can be a powerful path.