What warnings and advice does Chapter 16 offer to a seeker regarding their attitude and service to the Guru?

Chapter 16 provides clear guidance and warnings for a disciple. It stresses that the primary duty is to surrender completely to the Sadguru. The text explicitly cautions against 'cleverness' (Chaturai) and even the slightest neglect in service, as these will lead a seeker into trouble. Firm faith is presented as a necessity. The chapter teaches that the Guru accepts any offering, even a simple leaf, if given with sincere faith, but will turn away from anything offered with pride. The core message is that humble service is the only means to attain union with Brahman, while all other methods are destined to fail.