Programs must be written to be read
Our design of this introductory computer-science subject reflects two major concerns. First, we want to establish the idea that a computer language is not just a way of getting a computer to perform operations but rather that it is a novel formal medium for expressing ideas about methodology. Thus, programs must be written for people to read, and only incidentally for machines to execute. [emphasis is mine]
-- H. Abelson and G. Sussman,
Structure and Interpretation of Computer Programs,
MIT Press 1985.