Based on the provided excerpts, explain the indispensable role of the Guru in attaining spiritual realization.

The text from Chapter 32 posits that the Guru's role is absolutely central to spiritual progress. Guru's grace can reveal the treasure of knowledge effortlessly, making any personal search unnecessary. The ultimate goal of Moksha, the fourth supreme goal, cannot be attained without a Guru, rendering all personal effort futile. The profound nature of the Self, which cannot be comprehended by the body, senses, mind, or even intellect, can only be seen through the Guru's grace. Without a Guru, no one can show the path to that which is beyond direct perception and inference.