This article aims to unify all scientific theories based on the concept of “intrinsicality of nature”, including the fundamental theories in physics. First, the general property within existing natural phenomena, say “intrinsicality of nature”, was deduced as “logicality” and "imperfectness". Then, the identical intrinsicality was deduced out for the science to unify all scientific theories. Finally, with this intrinsicality and the novelties of consciousness, the unification of physics theories, say Theory of Everything, was framed by a physical (...) model of more fundamental element (MFE), which had managed to cover the concepts of quantum mechanics, general relativity, and the physics of consciousness altogether, to test this model of unification. Since the MFE is only a theoretical model, two methods were introduced for its experimental verification. While its application to explain yet unanswered questions in science was tested, and further verification of this model in a lab by measuring consciousness signals was discussed. (shrink)