Why must preachers focus on Christ when preaching?

Preaching Christ is fundamental because the entire Bible centers around Him as the Word made flesh (John 1:14). Every doctrine and teaching in Scripture points to understanding who Christ is and what He has accomplished for humanity. Paul emphasized in 1 Corinthians 2:2 that he determined to know nothing except Jesus Christ and Him crucified, showing that the core of the gospel is about Christ's work. This focus not only glorifies God but also instructs believers on how they can be justified before Him, which is the essence of preaching the Word.