Philosophical thinking is the originator of all thoughts, because philosophical thinking is abstract and macroscopic, which determines its relative objectivity. Mathematics is metaphysics, in fact, because mathematics is unprovable. It also belongs to people's abstract understanding of the world, but especially for the number of things. Physics and chemistry not only draw lessons from causality and abstract observation in philosophy, but also have practical examples to correct incorrect understanding and even improve philosophy. Many mathematicians are also well-known philosophers, because both of them belong to utopian disciplines. Philosophy is broad and can be proved.