The whole material world. It doesn't actually exist. Matter is not material. It's made up of atoms that are moving at lightning speeds around huge empty spaces. So as you go beyond the appearance of molecules, you end up with a subatomic world, and if you go beyond that you end up with nothing. Nothing is the source of everything.
I got a great grandma. Her name is Pearl, and she was at one time married to an Indian chief, who, in a wonderful crossing of cultures, she integrated some of his, and some of hers, and um, it was a combination of peyote and preserves, and it was this hallucinogenic jam.