Is it possible to achieve spiritual understanding through pure intellectualism, based on Das Ganu's experience?

Based on the narrative in chapter 20, pure intellectualism is presented as an inadequate path to true spiritual understanding. The text explicitly challenges the notion that a scholar can comprehend the Upanishads by their own efforts, stating that this "will not happen even at the end of an era." Das Ganu's own experience serves as a case study; he created a verse-commentary, but it left him with an unresolved doubt and no inner joy. It was only through the intervention and grace of his Guru, Sai Baba, that the difficulty vanished and the path to resolution opened. The text suggests that the "obstruction of the intellect" must be removed, which happens not by more thinking but through humility and following a Guru.