…And looking upon Jesus as he walked, he saith, Behold the Lamb of God! Jn. 1:36

Other prophets have also foretold how Christ would come and how He would free the world from sins. But neither Isaiah nor Jeremiah would have been able to say: This is the one whom you must accept. John is the only one whose voice was the first to announce Christ and whose fingers pointed to the person where the forgiveness of sins is actually to be found. No human being had ever had or seen fingers like those of John, with which he pointed to the Lamb of God. Therefore, when we are oppressed by sin, or terrified by the Devil or by Death, what we need to do is to look at the mouth and fingers of the preacher, who will give us the correct teaching and show us how to come to the forgiveness of our sins and how to make our peace with God. This is the joy that the whole world, not just Elizabeth and Zechariah, should have in John.

Martin Luther in Luther’s Breviary: A Meditation for Each Day of the Year (Wartburg Verlag 2007), p. 192

"Behold the Lamb!"