— Richard Feynman, livro The Character of Physical Law
Fonte: The Character of Physical Law (1965), chapter 2, “The Relation of Mathematics to Physics”
Contexto: Mathematics is not just a language. Mathematics is a language plus reasoning. It's like a language plus logic. Mathematics is a tool for reasoning. It's, in fact, a big collection of the results of some person's careful thought and reasoning. By mathematics, it is possible to connect one statement to another.