In his book "History of Time: From the Big Bang to Black Holes", Steven Hawkins concludes saying : "If we find [a unified theory], it would be the ultimate triumph — for then we would know the mind of god". May be he makes fun of the idea of "God" but that is his samskaara! But there is something worth noting in this. This statement may appear fascinating but probably a greater question is raised in Mundaka Upanishad:
"kasmin nu bhagavo vijNate sarvamidam vijNatam bhavati" what is that knowing which all these will become known! a curious pupil raising a profound question! and the Upanishad elaborates on that idea, elaborating which will need a book of more than 500000 pages (assuming we use timesroman, fontsize 10, singlespaced, A4 size pages).