Despite acknowledging that a Saint's worth is immeasurable, what compels the author to proceed with writing Sai's story?

As detailed in Chapter 2, the author is fully aware that a Saint's worth is immeasurable, comparing the task to measuring the seven seas or wrapping the sky. However, he finds Baba's glory to be irresistible. He explains that witnessing this glory gives rise to an uncontrollable wave of desire to sing his praises. This divine inspiration, which he believes is ignited by Baba himself, overrides his feelings of being a 'lowly person' and his daring effort feeling like a 'small mouth taking a big bite.' The compulsion comes not from his own intellect but from this overwhelming divine impulse.