The text mentions different types of biographical writing. Can you compare writing about worldly Gurus versus writing about saints, and explain their respective spiritual benefits?

The preface distinguishes between writing biographies of worldly Gurus and those of saints. Writing about worldly figures like parents and writers is considered a form of Guru service and public service, but its fruits are worldly, limited by time and space, and do not yield spiritual benefits because they are often rooted in self-interest. In contrast, as Chapter 0 clarifies, writing the biographies of many saints is a form of Guru service that does yield spiritual fruits. However, this is still considered a partial or one-sided service, and it is deemed difficult to attain the ultimate spiritual goal through this method alone.