Pythagoras school found that all measures, sequences, proportions and consistent cycles can be represented by numbers.
So they came to the conclusion that without numbers, there would be no such relationship and consistency, and there would be no order and law; So numbers must be the basis of everything. Numbers must be the real existence, the foundation of things, and everything is the expression of numbers.
The tangible world can also be represented by numbers, based on units. Point is one, line is two, surface is three and body is four. In addition, soil is hexahedron, fire is tetrahedron, gas is octahedron, water is icosahedron, and so on. That is to say, the line and face of an object are considered as independent entities, because the object must have a line and face, but the line and face can ignore the object. The form of these spaces is the cause of objects. Since these forms can be expressed by numbers, numbers are the ultimate reason. Mathematical differences have also been introduced into physics, and the Pythagorean school transforms into infinite space or vacuum according to this theory.
Pythagorean number theory has a great influence on physics and astronomy.