Acharya Prashant explains that the primary objective of the Upanishads is not the attainment of truth, but rather the cessation of the mind and the ending of falseness. He argues that truth cannot be 'attained' because attainment requires attributes, and truth is attributeless. The Upanishads focus on what one is not, using indicators like 'Tat tvam asi' only after exhausting the negation of the false. If the mind is told too much about the truth, it simply turns truth into another object of imagination, which defeats the purpose of spiritual inquiry.