How Does Christ Speak in the Preaching of the Gospel?

How Does Christ Speak in the Preaching of the Gospel? This regards the answer that Rev. J. Laning gave Mr. Chuck Doezema in the letters section of the November 15, 2000 issue of the Standard Bearer. Please explain how it is that Christ is indeed the One speaking in the preaching of the gospel. How is this possible since Christ is in heaven at the right hand of God His Father and will there be worshiped by us as the Catechism teaches in Lord's Day 30? Please explain the difference between...