Acharya Prashant explains that individuals do not carry memories from personal past lives. Instead, the human body, cells, and DNA carry a collective evolutionary memory of all humankind. He asserts that individuality is a myth created by the ego, which seeks to project a personal history to maintain its identity. In reality, every person is the resultant of millions of lives and deaths, and everything in existence belongs to everyone equally. The brain is described as a physical fact and a product of this collective evolutionary journey, whereas the mind is a flexible, fluid concept that exists only in activity and is centered on the 'I' or ego. Addressing the difference between the brain and the mind, Acharya Prashant notes that the brain is the physical seat of consciousness, while the mind is the movement of thoughts, feelings, and impulses. The mind exists as long as there is self-interest and identification with the ego. He suggests that a 'still mind' or 'no mind' occurs when the mind no longer needs movement or identification, even while the brain continues its biological functions. He emphasizes that thought is both a prison and a tool for liberation. One must use sharp, penetrating thought to investigate bondages, desires, and fears to eventually reach a state where thought is no longer needed. Acharya Prashant further discusses that thoughtlessness is not the random absence of thought but its fulfillment. He advises being a sharp, inward thinker who investigates one's own intentions and stakes in the world. He explains that the mind often runs in circles, promising solutions it cannot provide. Spiritual practice involves recognizing these inner dishonesties and the limitations of thought. By counseling the ego and understanding the biological nature of existence without attachment, one can move beyond petty concerns and self-defeating behaviors toward a state of liberation.