We need the Holy Spirit in order to make preaching effective. We should pray for the Spirit’s blessing on the preaching and the hearing of the gospel. Preachers must cull from their sermons everything that does not pertain to the Spirit’s power in preaching. Rhetoric in preaching is a means of making preaching an effective vehicle of communicating the gospel clearly in order to bring us to God.
However well constructed and attractive, a car is useless without fuel. On the flip side, a motor may have fuel without being a vehicle. Likewise, preaching is a vehicle that requires fuel. God designed preaching to bring us to himself through faith in Christ. If preaching does not have the right content, then it becomes more of a motor than a vehicle, since it can no longer take us where we need to go. If preaching has the right content, yet the Holy Spirit is absent from it, then it functions like a vehicle without fuel. It is only when Spirit shapes the content and blesses the act of preaching that preaching become a vehicle to bring us to God, through Christ, by the Spirit. In 1 Cor. 2:1-5, the Apostle Paul teaches these things when he writes:
“And I, brethren, when I came to you, did not come with excellence of speech or of wisdom declaring to you the testimony of God. For I determined not to know anything among you except Jesus Christ and Him crucified. I was with you in weakness, in fear, and in much trembling. And my speech and my preaching were not with persuasive words of human wisdom, but in demonstration of the Spirit and of power, that your faith should not be in the wisdom of men but in the power of God.”
Paul teaches us in this text that preachers must preach Christ in demonstration of the Spirit and of power. This truth both informs the content of preaching and shapes the manner in which ministers ought to preach. We learn several vital lessons here about what preaching is not, about what it is, and about the proper manner of preaching.