Epistles : the apostolic letters. The New Testament contains twenty-one in all. They are divided into two classes.
It is an interesting and instructive fact that a large portion of the New Testament is taken up with epistles. The doctrines of Christianity are thus not set forth in any formal treatise, but mainly in a collection of letters. "Christianity was the first great missionary religion. It was the first to break the bonds of race and aim at embracing all mankind. But this necessarily involved a change in the mode in which it was presented. The prophet of the Old Testament, if he had anything to communicate, either appeared in person or sent messengers to speak for him by word of mouth. The narrow limits of Palestine made direct personal communication easy. But the case was different when the Christian Church came to consist of a number of scattered parts, stretching from Mesopotamia in the east to Rome or even Spain in the far west. It was only natural that the apostle by whom the greater number of these communities had been founded should seek to communicate with them by letter."