Aristotle established the classical definition of man, according to which man is the living being who has logos. In the tradition of the West, this definition became canonical in a form which stated that man is the animal rationale, the rational being, distinguished from all other animals by his capacity for thought. Thus it rendered the Greek word logos as reason or thought. In truth, however, the primary meaning of this word is language.... The word logos means not only thought and language, but also concept and law.

Man and Language (1966)