Source: Einstein’s razor is an essay by Roger Sessions in the New York Times (8 January 1950).

Original Sentence: It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience.

Original Source: On the Method of Theoretical Physics” The Herbert Spencer Lecture, delivered at Oxford (10 June 1933); also published in Philosophy of Science, Vol. 1, No. 2 (April 1934).