This work introduces the Theory of Negativity, a conceptual framework in which knowledge is grounded not in affirmative truths but in the identification of limits. It argues that all systems claiming absolute validity eventually collapse under their own assumptions. Negativity is defined as the structural boundary where justification fails, leading to a reduction of fear and an increase in perceptual clarity. The framework distinguishes itself from nihilism by asserting that limitation does not negate existence but constrains its absolutization.