According to the initial chapter, what is the traditional reason for performing invocations, and which deities are mentioned?

According to Chapter 1 of the Sai Satcharitra, the traditional reason for performing auspicious invocations, or 'Mangalacharan', is to ensure the "obstacle-free completion" of a task and to "obtain the grace of the desired deity" for success. The chapter itself serves as an example of this etiquette. The author begins by bowing to Lord Ganapati (Ganesha), the destroyer of obstacles. The invocations continue with salutations to Goddess Saraswati, the goddess of speech and knowledge. Furthermore, Chapter 1 mentions bowing to the creators of the universe—Brahma, Vishnu, and Shankar—as well as the family deity, Narayana. Ultimately, all these invocations lead to Sadguru Sainath, who is presented as the embodiment of all these divine forms.