How does the text contrast intellectual knowledge with the true realization of the 'Substance'?

The text draws a stark contrast between intellectualism and direct realization using powerful analogies. Chapter 50 describes intellectual knowledge and scriptures as a lamp used for activities on a dark night; while useful, they are disregarded when the sun rises. The sun, in this metaphor, is the realization of the "Substance" or Self. It states that even great 'word-pandits' are like 'fireflies before the sun of the Substance.' This illustrates that intellectual knowledge is insignificant compared to the direct experience of the Self. The text emphasizes that once the Substance is obtained, the entire "web of words" and arguments from philosophies simply vanishes, rendered obsolete by true understanding.