Where does one start with this book? It begins with a radical idea and ends when the radical has been thoroughly transformed into the commonplace and sensical. It spans archaeology, anthropology, literary history, neurology, psychiatry, theoretical linguistics, and history of science, across several civilisations. One might think that this addresses too much and in the end accomplishes nothing. But this is mistaken -- I am a theoretical linguist and was thoroughly convinced about the author's notion of metaphorical perception. The author gathers an impressive range of evidence through time, space, and academic perspectives to show convergence towards the bicameral thesis. Truly a towering intellect.