The voice said,
Cry.
And he said, What shall I cry?
All flesh is grass, and all its loveliness is as the flower of the field:
All Commentaries on Isaiah 40:6 Go To Isaiah 40
Basil the Great
AD 379
“The voice of the Lord is on the waters.” In many places you might find the word voice occurring. Therefore, for the sake of understanding what the voice of the Lord is, we should gather, as far as we are able, from the divine Scripture what has been said about the voice; for instance, in the divine warning to Abraham: “And immediately the voice came to him: He shall not be your heir.” And in Moses: “And all the people saw the voice and the flames.” Again in Isaiah: “The voice of one saying, Cry.” With us, then, voice is either air that has been struck or some form that is in the air against which he who is crying out wishes to strike. Now, what is the voice of the Lord? Would it be considered the impact on the air? Or air, which has been struck reaching the hearing of him to whom the voice comes? Or neither of these but that this is a voice of another kind, namely, an image formed by the mind of people whom God wishes to hear his own voice, so that they have this representation corresponding to that which frequently occurs in their dreams? Indeed, just as, although the air is not struck, we keep some recollection of certain words and sounds occurring in our dreams, not receiving the voice through our hearing but through the impression on our heart itself, so also we must believe that some such voice from God appeared in the prophets.
