In Chapter 24, what is meant by the phrase 'people are blind despite having eyes,' and what is the cause of this blindness?

According to the teachings in Chapter 24, the phrase 'people are blind despite having eyes' refers to a spiritual blindness. This is not a physical ailment but a state where people, due to the strength of their body-consciousness, fail to understand their own true welfare. The chapter explains that this attachment to the physical body, which is itself momentary and uncertain, leads people to chase fleeting worldly pleasures. This focus on the transient, as described in Chapter 24, prevents them from seeing the path to their supreme goal and achieving contentment, making them effectively 'blind' to spiritual truth.