The spoken word of the gospel should preach only Christ and point only to him

Whatever has been said in the Advent season concerning John the Baptist is also to be understood here; just as he was the forerunner of Christ and directed the people to him, so the spoken word of the gospel should preach only Christ and point only to him. For only to that end was it ordained by God, just as John was sent by God (as we have heard), so that he should be the voice in the wilderness who with his office signifies the spoken preaching of the gospel. Just as the darkness was unable, on its own, to comprehend this light, even though it was present, John had to reveal and to bear witness of it. To this day natural reason on its own is unable to comprehend it, even though it is present in all the world. The spoken word of the gospel must reveal and proclaim it.