In discussions on the ministry those who claim to belong to the more ‘catholic’ branch of the Church, often say that their ministry is priestly whereas that of the ‘reformed’ tradition is prophetic. The representatives of the latter are usually happy to accept this as an accurate description of their own ministry, but go on to point out that the ‘catholic’ ministry is not really priestly, arguing that, since there is one priest, Jesus Christ, who has already offered the one necessary sacrifice, there is no longer need of other sacrifices, or priests to offer them. With the validity of that argument we are not at present concerned; we are concerned, though, to inquire in what sense the Reformed minister may be described as a successor to the prophets, or, to put it another way, what is prophetic preaching? Since the word ‘prophet’ occurs in Scripture and since we claim that our faith is biblical, it is incumbent on us to examine the conception of the prophetic office as found in Scripture. Since the prophets of the Old Covenant and those of the New are not necessarily the same it is necessary to divide our inquiry; we consider first the prophets of the Old Testament.