Here are some thoughts about the task of cruciform preaching, from my earlier book, A Theology of Proclamation (Abingdon).
A robust theology of the cross is a reminder to us preachers that there is no eloquent, rhetorically savvy way by which our congregations can ascend to God. All of our attempts to climb up to God are our pitiful efforts at self-salvation. The gospel is not a story about how we are seeking God, but how God in Christ seeks us. God descends to our level by climbing on a cross, opening up his arms, and dying for us, because of us, with us. Paul’s thoughts on the foolishness of preaching that avoids “lofty words of wisdom” suggests that Christian rhetoric tends to be simple, restrained, and direct – much like the parables of Jesus. The Puritans developed what they called the “plain style” of preaching out of a conviction that Christian speech ought not to embellish, ought not to mislead hearers into thinking they there was some way for a sermon to work in the hearts and minds of the hearers apart from the gift of the Holy Spirit that makes sermons work.
Christian theology has always affirmed that the cross is not only a window through which we see the true nature of God as the embodiment of suffering love but also the truthful mirror in which we see ourselves. Cruciform preaching can’t help but speak of our sin. Jesus was nailed to the wood on the basis of a whole host of otherwise noble human ideals and aspirations like law and order, biblical fidelity, and national security. Preaching offers the grace of God along with a good dose of honesty about the human condition, honesty that we would not have had without the cross. After Calvary we could no longer argue that we are, down deep, basically good people who are making progress once we get ourselves organized and enlightened. The cross is also a reminder that Jesus’ preaching was brutally rejected and if our preaching is about Jesus, then it will often be rejected as well. There is no way to talk about gospel foolishness without risking rejection. Preachers therefore ought to be more surprised when a congregation gratefully understands, receives, and inculcates our message rather than when it misunderstands, rejects, and ignores our message. "We are fools for the sake of Christ" (1 Cor. 4:10).
Because of the cross, preaching Jesus can be a perilous vocation. One of the first great Christian sermons was that of Stephen who, for his homiletical efforts, was stoned to death (Acts 7-8). Christian preachers not only talk like Jesus but sometimes suffer and die like Jesus. Jesus was upfront in saying that the cross is not optional equipment for discipleship: “If anyone wants to follow after me, let him deny himself and take up his cross and follow me. For whoever wants to save his life will lose it, and whoever loses his life for my sake and for the sake of the gospel will save it” (Mark 8:34-35). When this episode is reported by Luke (Lk. 9:18-26) Jesus goes on to relate cross bearing to “me and my words” (v. 26). Sometimes, the particular, peculiar cruciform burden that preachers must bear is the words of Jesus. The cross is not some chronic illness, not some annoying person. The cross is that which is laid upon us because we are following a crucified savior and, for us preachers, having to proclaim the words of this savior can be quite a burden. For Paul, the cross is not only something that God does to and for the world, unmasking the world’s gods, exposing our sin, forgiving our sin through suffering love, but also the cross is the pattern for Christian life. He could say, “I have been crucified with Christ; and it is no longer I who live, but it is Christ who lives in me. And the life I now live in the flesh I live by the faith of the Son of God, who loved me and gave himself for me” (Gal. 2:19-20, as translated in the NRSV footnote). And yet, the good news is that his yoke is easy and his burden is light, which is to say as burdensome and difficult as Jesus and his words can be, they are less burdensome and more fun than most of the other burdens the world tries to lay on our backs. Of this I am a witness.