Mathematics is as much an aspect of culture as it is a collection of algorithms. – Carl Boyer, 1949, calculus textbook

The laws of nature are but the mathematical thoughts of God. – Euclid

Nature does not count nor do integers occur in nature. Man made them all, integers and all the rest, Kronecker to the contrary notwithstanding. – Percy William Bridgman, The Way Things Are

Arithmetic is where numbers fly like pigeons in and out of your head. – Carl Sandburg, "Arithmetic"