Mark 1:14 - "Now after John was arrested, Jesus came into Galilee, preaching the Gospel of God,"
Preaching, the proclamation of a divine message, and the regular instruction of the converted in the doctrines and duties of the faith, is as old as the human family. Noah is referred to as "a preacher of righteousness" (2 Peter 2:5). This is not a distinctly Judaistic or Christian concept; the Mohammedans practice it freely, and it is not unknown among the Buddhists. It has its roots in the activity of the Hebrew prophets and scribes, the former representing the broader appeal, the latter the edification of the faithful, and in the ministry of Jesus Christ and his apostles, where again we have both the evangelical invitation and the teaching of truth and duty. Whichever is emphasized in preaching, the preacher is one who believes himself to be the ambassador of God, charged with a message which it is his duty to deliver.
From the Acts of the Apostles we gather something of the methods adopted by St. Peter and St. Paul, and these we may believe were more or less general for the preachers of the Primitive Church. The Apostles who had known the Lord would naturally recall the facts of his life, and the story of his words and works would form a great deal of their preaching. It is not until we come to Origen (d. 254) that we find preaching as an explanation and application of definite texts, a usage that Christianity adopted from Greek rhetoricians.
The New Testament writers drew a definite distinction between preaching and teaching. Preaching is the proclamation of the gospel to men who have not yet heard it. Teaching is an instruction or exhortation on various aspects of Chrisitan life and thought addressed to a community already established in the faith.
Today, of course, the preacher or minister or pastor of a congregation is usually called upon to perform both functions. But the preaching mission of the church is still its prime function and should be considered so.
See HERALD