What I think is that the universe is pure geometry – basically, a beautiful shape twisting around – and this shape is described by mathematics. This is a slightly different view than believing the universe IS mathematics, but it’s close. Since E8 is perhaps the most beautiful structure in mathematics, is very satisfying that nature appears to have chosen this geometry. FQXi Forum: An Exceptionally Simple FAQ See also: Backreaction: A Theoretically Simple Exception of Everything