I'm looking for guidance related to a specific deity not found in the text. Is the book's wisdom still applicable to me?

Yes, the wisdom in Chapter 19 is universally applicable because it centers on the essence of devotion itself, rather than on particular names. The text teaches that the 'sense of difference like 'I and Thou' is the wall between Guru and disciple,' a concept that can be extended to the differences between various forms of the divine. The core secret is constant remembrance and undivided attention. Chapter 19 references the Bhagavad Gita's promise that security is provided to those who are 'constantly united' in their thoughts with the divine. It advises that 'as the practice, so the benefit,' meaning the fruits of your spiritual efforts depend on your sincerity, not the specific name you chant.