Acharya Prashant explains that India is not merely an idea, as ideas are products of the ego, desire, and imagination. He defines a nation as a set of people united on a specific basis, noting that the quality of a nation depends on the depth of its foundation. While many nations are built on shallow foundations like language, geography, skin color, or religion, India's foundation is uniquely deep. He argues that foundations based on mental constructs or dogmas are inherently divisive and lead to suffering, as seen in historical examples where religious identity failed to maintain national unity against the force of the ego.