Language is only secondarily a social tool. Its primary function is to enhance the power of the individual mind. Meaning, however, is a concept that you cannot define in terms of simpler concepts. Meaning, as we have seen, is prior to any logical manipulations. It is the basis for all concepts and the foundation for valid reasoning.
Man forms percepts automatically.
But man forms concepts and manipulates them only by choice. Deep thinking requires concentrated effort. You will find that when you have a few large words in front of you, reading them is automatic. You are in the habit of thinking, the habit of processing knowledge. The more you do it, the easier and more automatic it becomes and the freer you become to proceed volitionally to still higher-level concepts.