What philosophical teachings on pride, selflessness, and the nature of a wise person are presented in Chapter 5?

Chapter 5 delves into the philosophical necessity of acting without pride to achieve one's spiritual welfare. It posits that one who has 'burned the pride of the body' makes their life meaningful and can then become a disciple to attain the supreme goal. The text explains that a truly wise person's actions are governed by previous karma, and they do not identify as the doer. Such a person, whose own form is the entire universe, resides in a state of non-duality, much like the sun cannot enter darkness. This state of desirelessness is key to climbing the 'fort of selflessness.'