Pythagoras in ancient Greece first linked philosophy with mathematics, because the abstract thinking of mathematics is very consistent with the pursuit of origin by philosophy. In fact, as far as the ontology pursued by philosophy is concerned, I tend to be agnostic. It is this unspeakable unknowability that forces people to try to explore the content of philosophy with something extremely abstract or even inexplicable, and mathematics is like an abstract tool. The abstraction of mathematics is the simplest and most mysterious rational knowledge constructed by human beings. After the emergence of mathematics, many human lives have made great progress. Derrida and other postmodern philosophers even regard digitalization and virtualization as a new world constructed by human beings in the future. The emergence of this world will eliminate all the unknowable and unspeakable anguish of pure thinking, that is, the result of constructing abstract thinking in the human brain through digital virtualization, and you can even use a computer to visualize the whole evolution process of the universe. In this way, numbers further concretize abstract things, even though the origin of the universe is unknown. The mathematics I understand is not ontology, and the ontology of the universe can't be mathematics, because we just regard the abstraction of mathematics as a measure of the mysterious nature of the universe. However, even if the ontology of the universe is abstract, we cannot know what this abstraction is. At least I think the best ontology is agnosticism, which is more scientific. The advantage of mathematics is to dispel the discourse discussion of pure thinking. After the concretization of numbers, people can simulate everything, and mathematics has made great contributions.