John, then, appears as the boundary between the two testaments, the old and the new. That he is a sort of boundary the Lord himself bears witness, when he speaks of the law and the prophets up until John the Baptist. Thus he represents times past and is the herald of the new era to come. As a representative of the past, he is born of aged parents; as a herald of the new era, he is declared to be a prophet while still in his mother’s womb. For when yet unborn, he leapt in his mother’s womb at the arrival of blessed Mary. In that womb he had already been designated a prophet, even before he was born; it was revealed that he was to be Christ’s precursor, before they ever saw one another. These are divine happenings, he is born, he receives his name, his father’s tongue is loosened. See how these events reflect reality.
Zechariah is silent and loses his voice until John, the precursor of the Lord, is born and restores his voice. The silence of Zechariah is nothing but the age of prophecy lying hidden, obscured, as it were, and concealed before the preaching of Christ. At John’s arrival Zechariah’s voice is released, and it becomes clear at the coming of the one who was foretold. The release of Zechariah’s voice at the birth of John is a parallel to the rending of the veil at Christ’s crucifixion. If John were announcing his own coming, Zechariah’s lips would not have been opened. The tongue is loosened because a voice is born. For when John was preaching the Lord’s coming he was asked: Who are you? And he replied: I am the voice of one crying in the wilderness. The voice is John, but the Lord in the beginning was the Word. John was a voice that lasted only for a time; Christ, the Word in the beginning, is eternal.
St. Augustine
from The Liturgy of the Hours, vol III, p. 1488.
