It is a great fault of symbolic pseudo-mathematical methods of formalising a system of economic analysis (...) Too large a proportion of recent “mathematical” economics are mere concoctions, as imprecise as the initial assumptions they rest on, which allow the author to lose sight of the complexities and interdependencies of the real world in a maze of pretentious and unhelpful symbols.

John Maynard Keynes "The General Theory of Employment, Interest and Money"