Why is a Guru considered indispensable for attaining Moksha (liberation), even when other goals can be achieved through personal effort?

The text explains that while worldly goals like Dharma (duty), Artha (wealth), and Kama (desire) can be attained through one's own efforts, the ultimate goal of Moksha (liberation) has a unique requirement. As Chapter 32 clarifies, the nature of the Self is so profound that it cannot be comprehended by the body, senses, mind, or even the intellect. Standard methods of proof like direct perception and inference are invalid in this pursuit. Therefore, for this 'fourth supreme goal,' all personal effort is futile without a guide. Only a Guru, through their grace, can reveal the vision of the Self, making it as 'clear as a gooseberry in the palm.' This is why, as stated in Chapter 32, the Guru's role is absolutely essential for transcending birth and death.