Does preaching still have any meaning in our time and age? Is the sermon a relic of the past? This essay wants to reflect on the theological question of what preaching really is. The true renewal of preaching can only happen in the way of understanding the real nature and function of preaching. A renewal on the level of preaching technique alone is not really a renewal at all. In the New Testament, we find the origin of what Christian preaching is. Some key terms used for preaching are examined.