Chapter 24 mentions that 'people are blind despite having eyes.' What is the deeper, philosophical meaning of this blindness as explained in the text?

The statement about people being 'blind despite having eyes,' as found in Chapter 24, refers to a spiritual blindness rather than a physical one. The text explains that this condition is caused by the 'strength of their body-consciousness.' People become so attached to their physical bodies—which the chapter notes are uncertain for even a moment—and the pursuit of momentary pleasures that they fail to understand their own true welfare. This spiritual blindness prevents them from seeing beyond the transient world to grasp the supreme goal, or Parmartha, and achieve contentment through meditation on the true self.