Abraham Kaplan Quote

Laws serve to explain events and theories to explain laws; a good law allows us to predict new facts and a good theory new laws. At any rate, the success of prediction... adds credibility to the beliefs which led to it, and a corresponding force to the explanations they provide.

The Conduct of Inquiry: Methodology for Behavioral Science, Chapter IX, Section 40 (p. 346), Chandler Publishing Company. 1964