“Gravitation, n. The tendency of all bodies to approach one another with a strength proportioned to the quantity of matter they contain—the quantity of matter they contain being ascertained by the strength of their tendency to approach one another. This is a lovely and edifying illustration of how science, having made A the proof of B, makes B the proof of A.”
Excerpted from: Bierce, Ambrose. David E. Schultz and S.J. Joshi, eds. The Unabridged Devil’s Dictionary. Athens: The University of Georgia Press, 2000.