What information does the Shri Sai Satcharita's preface provide about Saint Augustine?

The provided text from the Preface of the Shri Sai Satcharita does not mention Saint Augustine. The focus of Chapter 0 is to establish the foundational Hindu principle that there is no salvation without the grace of a Sadguru, a belief it traces back to Vedic times. It elaborates on the nature of Guru service, citing Lord Samarth Sadguru Dnyaneshwar Maharaj's commentary on the Shrimad Bhagavad Gita to illustrate its importance. The text does not offer a catalog of saints from various traditions, but rather explains the philosophy behind devotion to a Sadguru.