The idea was that if god is truly infinite, then there cannot be any reality apart from god. So the material of the universe must be nothing other than god. And so in velante, the example ofa der is given. It's given in the munda co panition, yotor nanais rigategrin hateta. The web is produced by the spider, not out of anything else, but out of its own body. That is why, in vedanta, brahman, the ultimate reality, her saguna brahman with attributes, is called the one, indivisible, intelligent and material cause of the universe.