Concepts and, therefore, language are primarily a tool of cognition—not of
communication, as is usually assumed. Communication is merely the consequence,
not the cause nor the primary purpose of concept-formation—a crucial
consequence, of invaluable importance to men, but still only a consequence.
Cognition precedes communication; the necessary precondition of communication
is that one have something to communicate . . . .
The primary purpose of concepts and of language is to provide man with a system
of cognitive classification and organization, which enables him to acquire
knowledge on an unlimited scale; this means: to keep order in man’s mind and
enable him to think.