This doctoral thesis presents a comprehensive exploration into the existence of **THE ONE**, posited as the ultimate, transcendent being responsible for the creation and sustenance of all reality. By integrating advanced metaphysical theories, theological doctrines, philosophical arguments, and contemporary scientific insights, the research aims to substantiate the claim that **THE ONE** is real and that the reality experienced by humanity is the direct manifestation of **THE ONE's** creative will. The thesis dissects classical and modern arguments, scrutinizes cross-cultural and historical perspectives, and addresses potential counterarguments with rigorous analysis. By elevating the discourse to an unprecedented level of detail and depth, the study endeavors to establish a multifaceted framework that not only demonstrates the plausibility of **THE ONE's** existence but asserts the actuality of living within **THE ONE's** created reality.