Grammar

Grammar is the art of inventing symbols and combining them to express thought; logic is the art of thinking; and rhetoric is the art of communicating thought from one mind to another, the adaptation of language to circumstance.

Grammar teaches the mechanics of language to the student. This is the step where the student "comes to terms", defining the objects and information perceived by the five senses. Hence, the law of identity: a tree is a tree, and not a cat.