Prophet
The idea of a "prophet" is very closely tied to the idea of the Bible itself, since the Bible was largely written by prophets. At a lower level, prophets represent people who teach from the Bible. At a higher level, they represent the Lord as He reveals himself through the Bible. Viewed in a abstract way, prophets represent the holy parts of the Bible themselves, and also represent doctrine drawn from the Bible. The reason we say "largely written by prophets" and "the holy parts of the Bible" is that not all of the books currently included in the Bible have a complete and continuous internal sense. Some -- like Job, Ruth, and Song of Solomon -- are wonderful literary pieces that got included, but which lack the systematic meanings for words and phrases. Others -- the Acts and Epistles, primarily -- are really doctrinal works, the first attempt by others to extract meaning from Jesus' life and words.
Leviticus 18:25-28
25
The land was defiled: therefore I punished its iniquity, and the land vomited out her inhabitants.
26
You therefore shall keep my statutes and my ordinances, and shall not do any of these abominations; neither the native-born, nor the stranger who lives as a foreigner among you;
27
(for all these abominations have the men of the land done, that were before you, and the land became defiled);
28
that the land not vomit you out also, when you defile it, as it vomited out the nation that was before you.
