Acharya Prashant explains the concept of Yajna as an act that diminishes the ego rather than expanding it. He describes Yajna as a sacrifice where one offers their own self as an oblation, driven by a higher inspiration rather than personal gain. He clarifies that while ordinary actions usually add layers to our identity, Yajna is a process of reduction. Referring to Shri Krishna's teachings in the Bhagavad Gita, he notes that those who do not perform Yajna find no happiness in this world or the next. He defines the 'human world' as the material realm perceived through the senses and the 'other world' as the spiritual realm of truth, love, and liberation. He argues that material accumulation without sacrifice leads to suffering because people mistakenly seek spiritual fulfillment through physical objects. When individuals treat material things like houses or relationships as substitutes for ultimate truth, they end up disappointed. He illustrates this with examples of how people project their desires onto children or nature, only to feel pain when those projections fail. Acharya Prashant emphasizes that one cannot live a balanced life by trying to stay in the middle; either one gains both the material and the spiritual through sacrifice, or one loses both by clinging to the ego. He concludes that true peace in the material world is only possible when one is not attached to it as a source of ultimate happiness.