Rene Descartes Quotes
I accept no principles of physics which are not also accepted in mathematics.
Descartes, René. Principles of Philosophy. Translated by Valentine Rodger Miller and Reese P. Miller, Springer, 1983, p. 78.
3rd Earl Russell of Kingston. In mathematics the numbers can count people, autos, sins, molecules, or paintings. The mathematician does not know or care. And the mathematics is the same regardless. And the fundamentals themselves are unknown. For example, what is a number? It’s not the symbol we write; that is a numeral. Some say that it is an abstract idea that represents a quantity like 5. But what is 5? That itself is an abstraction. So few mathematicians and no layman know what they are talking about when they do mathematics. Lord Russell, with his colleague Whitehead, built up a system where they could define a number as a set with certain properties. But they take 3 large volumes full of equations in a small type font to just get to 3rd grade arithmetic and knowing what they are talking about. In politics, we also often do not know what we are talking about, but that is for a much simpler set of reasons.
René Descartes was a French-born philosopher, mathematician, and scientist who spent a large portion of his working life in the Dutch Republic, initially serving the Dutch States Army of Maurice of Nassau, Prince of Orange and the Stadtholder of the United Provinces. One of the most notable intellectual figures of the Dutch Golden Age, Descartes is also widely regarded as one of the founders of modern philosophy.