Acharya Prashant explains that the primary objective of the Upanishads is not the attainment of truth, but the cessation of the mind and its falseness. He argues that truth cannot be 'attained' because attainment requires attributes, and truth is attributeless. The Upanishads focus on showing the seeker what they are not, using subtle indicators like 'Tat tvam asi' only after the mind's illusions have been dismantled. By telling the mind too much about the truth, it risks becoming just another object for the mind to consume and limit.