What were Sai Baba's teachings on the importance of the Guru, as mentioned in the text?

According to the teachings described in Chapter 19, Sai Baba placed immense importance on the Guru. He advised followers to look at him with undivided attention, promising that he would reciprocate in the same way and that spiritual wealth would follow. Baba emphasized that one should have complete faith that the Guru is the ultimate doer and destroyer, negating the need for an abundance of other spiritual means or cleverness in the scriptures like the six Shastras. He equated the Guru with the divine forms of Hari, Hara, and Brahma, suggesting that understanding the Guru's ways brings blessings in all three worlds.