When the "science of morphology" was developed to look at the structures of words, and the science of grammar was developed to look at the parsing of what is composed of them. "Al-Bayan" was created to look into the issue of this structure, and it is three sciences: The first science: what guards against error in conveying the meaning that the speaker wants to convey to the mind of the listener, and it is called "the science of meanings." The second science: what guards against moral complexity - that is, against speech being unclear in indicating the intended meaning - and it is called "the science of rhetoric." The third science: what is intended to improve speech, and it is called "the science of the exquisite." The knowledge of Badi' is subordinate to them; Because by them self-improvement is known, and by them is known as accidental improvement.
Speech as "meanings and explanation" is said to be: "eloquent" in terms of pronunciation; Because in eloquence, consideration is given to the mere pronunciation rather than the meaning. And "eloquent" in terms of both pronunciation and meaning. Because eloquence considers both sides. As for considering Al-Badi', it is not said that he is eloquent or eloquent. Because what is wonderful is an external matter intended to improve speech and nothing else. If this is decided, the student of eloquence must know the meaning of "eloquence and eloquence" before embarking on it. Because they are the focus of his research, and they are the reference for his research. They are the goal at which the speaker and writer stop, and the lost thing they seek.