Acharya Prashant explains that the Upanishads arise from a deep sense of disillusionment with the world. He begins by stating that there is no one among us who does not constantly have the doubt or fear of being deceived. In response to this deception, there are two types of people: those who accept living with it and make it a habit, and those who are deeply pained by it and cannot bear it. This deception is the nature of life itself, where what feels good now soon feels bad, and the person one cannot live without today becomes someone they cannot live with tomorrow. A sensitive mind is tormented by this constant flux, questioning what is truly happening. One might find something or someone and feel that things are settled, but soon, that too fades away. This fading is certain, though its duration may vary from a moment to a lifetime. A sensitive mind, realizing that everything that appears is bound to disappear, concludes that it must all be false. It says, "Don't make me dance like this." When one experiences love or happiness, it feels real; if it felt fake, one wouldn't experience it. Yet, these experiences promise to be real but ultimately break that promise. This deception applies not only to happiness but also to sorrow, which also feels real in the moment but eventually passes. Even sorrow lacks stability and dignity. The Upanishad is the human's search for something trustworthy and free from deception. It is a powerful response from human dignity to the world, a declaration that says, "You have fooled me and enslaved me enough. I will no longer be dependent on you." The Upanishad is for those who have seen the ugly face of the world and their own helplessness. It is not escapism but a revolution that requires a courageous heart. The journey begins when one has experienced life fully, seen all its colors, been hurt by it, and finally says, "No more." This "No" is the foundation of the Upanishads, as exemplified by the principle of 'Neti, Neti' (not this, not this). The Upanishad is the ultimate pride, where the ego unites with the Supreme. It is the voice of one who has lived life, experienced its deceptions, and then, out of that deep pain and disillusionment, says a firm "No" to the world and its offerings, beginning the path to liberation.