Feynman was a genius. It takes a genius to say something like that, and it's surprising how many "scientists" are upset by statements like that, because they are so proud of their hard-won capabilities in modelling. Their curl and divergence operators, their Maxwell's equations... they forget that the map is not the terrain, and the universe is, at it's root, irreducibly mysterious, and the fact that we understand anything about it at all is gobsmacking.