In this Rupert Spira Podcast episode, moderated by Simon Mundie, Rupert talks with cognitive scientist Donald Hoffman about the hard problem of consciousness, using maths to describe reality and whether or not the concept of space-time is doomed. Other topics include questions such as ‘Are we closer yet to a theory of everything?’, ‘Why does the one localise?’, ‘Is science finally catching up with what the great spiritual traditions have been telling us for centuries?’ and ‘Does the perennial philosophy need an upgrade?’