Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 3
In those days came John the Baptist, preaching in the wilderness of Judæa, And saying, Repent ye: for the kingdom of heaven is at hand. For this is he that was spoken of by the Prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make His paths straight.
The voice is a confused sound, discovering no secret of the heart, only signifying that he who utters it desires to say somewhat; it is the word that is the speech that openeth the mystery of the heart. Voice is common to men and other animals, word peculiar to man. John then is called the voice and not the word, because God did not discover His counsels through him, but only signified that He was about to do something among men; but afterwards by His Son he fully opened the mystery of his will.