A theory of everything (TOE), or, grand unified theory (which Einstein had been working on without success, with Superstring Theory now being a good candidate), is one which unites all the forces of nature, namely, gravity, electromagnetism, the strong nuclear force and the weak nuclear force. Important as this theory might be, it is lacking in one important fundamental aspect, namely, the role of consciousness, which could in fact be considered the most fundamental aspect of physics, for example its apparently significant role and impact in quantum theory which would be explained in this paper. This paper explains that a theory of consciousness is more important than a theory of everything or grand unified theory and could potentially be the theory of everything, or, at least, a part of the theory of everything, consciousness having been the model for artificial intelligence (AI) that has become very powerful and a threat to society itself. This paper is the sequel to the paper The Ultimate Law of Nature which was published in Physics Essays in 2009. (This paper is published in international physics journal.)