Acharya Prashant explains that according to Shri Krishna, the intellect is part of nature and is essentially material, not divine or conscious. He emphasizes that the intellect is composed of the same elements as the physical world, such as chemicals and the three gunas. This realization is often a blow to the human ego, which takes great pride in being 'intelligent' and identifies deeply with its mental faculties. He illustrates this by pointing out how chemicals like alcohol can easily alter one's intellect, proving its chemical and material basis. The speaker clarifies that while the intellect is a sophisticated tool or instrument, it is not the source of truth. It is like a microphone; its value depends entirely on who is speaking through it. If the ego uses the intellect, it leads to conflict and suffering, but if it is guided by higher consciousness or 'Bodha', it becomes a useful servant. He further discusses how to identify what is driving one's intellect by looking at its goals. If the intellect is used to defend the ego during an argument, its source is the ego. If it seeks peace and truth, its source is higher. Acharya Prashant warns against the trend of dismissing the intellect in spirituality, asserting that true spirituality requires a sharp, razor-like intellect that understands its own limitations. A sign of a maturing spiritual intellect is the development of 'insight' and the dissolution of binary thinking, such as strictly labeling things as 'good' or 'bad'. As one progresses, fear, hatred, and attachment decrease, replaced by a sense of openness and non-violence. He concludes that the intellect should be used fully, but one must remain vigilant about whether it is serving the ego or the truth.