This is a quote by George E Box. Share if you like it.
In short, all models are approximations. All models are wrong, but some are useful. George E Box (18 October 1919 – 28 March 2013) was a British statistician, who worked in the areas of quality control, time-series analysis, design of experiments, and Bayesian inference. He has been called "one of the great statistical minds of the 20th century".