The great challenge of the preacher is to follow Paul in 2 Corinthians 4:5, “What we proclaim is not ourselves, but Jesus Christ as Lord, with ourselves as your servants for Jesus' sake.”
But there are more ways to preach ourselves than one might think. This word from James Denney has exerted a sobering effect on me since I first read it in 1982. He had these words framed and posted in the vestry of his Scottish church.
No man can bear witness to Christ and to himself at the same time. No man can give the impression that he himself is clever and that Christ is mighty to save. (Quoted in John Stott, Between Two Worlds, 325)