James C. Maxwell Quotes
The numbers may be said to rule the whole world of quantity, and the four rules of arithmetic may be regarded as the complete equipment of the mathematician.
Maxwell, James Clerk. "On the Mathematical Classification of Physical Quantities." The Scientific Papers of James Clerk Maxwell, edited by W. D. Niven, vol. 2, Cambridge University Press, 1890, p. 257.
James Clerk Maxwell FRSE FRS was a Scottish scientist in the field of mathematical physics. His most notable achievement was to formulate the classical theory of electromagnetic radiation, bringing together for the first time electricity, magnetism, and light as different manifestations of the same phenomenon. Maxwell's equations for electromagnetism have been called the "second great unification in physics" where the first one had been realised by Isaac Newton.