It is just as foolish to complain that people are selfish and treacherous as it is to complain that the magnetic field does not increase unless the electric field has a curl. Both are laws of nature.

John von Neumann (1903-1957) Hungarian-American mathematician, physicist, inventor, polymath [János "Johann" Lajos Neumann]

(Attributed)
    (Source)

More in Eugene Wigner, "John von Neumann (1903-1957)," Yearbook of the American Philosophical Society (1958); later collected in Wigner's Symmetries and Reflections.