Acharya Prashant emphasizes the supreme power of 'Jigyasa' (inquiry or curiosity), stating that no matter what stands before you in the world, you must never abandon it. Even the greatest powers, wealth, strength, prestige, high positions, crowns, and thrones will tremble before a person who possesses a question. He warns that fear and greed are the two things that kill this power of inquiry, causing one's questions to die. The speaker explains that wherever one faces defeat, sorrow, or wounds in life, the sole reason is a lack of understanding. There is no other cause. Therefore, the most crucial question to ask is, "What am I not understanding?" He assures that if one asks this question sincerely, it is impossible not to emerge victorious. This is the power of a question. To illustrate his point, Acharya Prashant refers to the story of Nachiketa and Yamaraj from the Katha Upanishad. Nachiketa is granted three boons. The first is for his father, related to the body. The second is about 'Agni Vidya' (the knowledge of fire rituals) to attain heaven, which represents worldly knowledge and desires. The third and most profound boon is the secret of death and the Self (Atma). Yamaraj readily grants the first two boons but hesitates to answer the third, instead offering Nachiketa numerous worldly temptations. This hesitation highlights the supreme importance of Self-knowledge over all worldly gains. Acharya Prashant further elaborates on the concepts of heaven and hell, quoting Kabir Saheb and the Niralamba Upanishad. He redefines heaven not as a celestial place but as 'Satsang' (the company of the wise and truthful), and hell as the company of worldly people. The goal of religion is often seen as attaining heaven, which is a desire for infinite pleasure, but the true goal of spirituality is 'Mukti' (liberation). The company of a sage is akin to death because it forces one to confront the transient nature of the world, making one feel as if everything is being taken away. This fear is a sign of being in true heaven. In conclusion, the speaker highlights that Nachiketa, the inquirer, makes Yamaraj, the embodiment of death and falsehood, tremble. The ultimate inquiry is into the nature of the Self, and this is the only path to Truth. The price of inquiry is knowledge itself. Until one attains knowledge, one must never abandon inquiry. When a seeker confronts a lie with a question, the lie's first admission must be its own falsehood.