Henri Poincaré Quote
The facts of greatest outcome are those we think simple; may be they really are so, because they are influenced only by a small number of well-defined circumstances, may be they take on an appearance of simplicity because the various circumstances upon which they depend obey the laws of chance and so come to mutually compensate.
The Foundations of Science, Science and Method, Book IV, General Conclusion (pp. 544—545), The Science Press. 1913