6 Consider, then, brethren, if perchance John is not one of those mountains concerning whom we sang a little while ago, “I have lifted up my eyes to the mountains, from whence shall come my help.” Therefore, my brethren, if you would understand, lift up your eyes to this mountain, that is, raise yourselves up to the evangelist, rise to his meaning. But, because though these mountains receive peace he cannot be in peace who places his hope in man, do not so raise your eyes to the mountain as to think that your hope should be placed in man; and so say, “I have lifted up my eyes to the mountains, from whence shall come my help,” that you immediately add, “My help is from the Lord, who made heaven and earth.” Therefore let us lift our eyes to the mountains, from whence shall come our help; and yet it is not in the mountains themselves that our hope should be placed, for the mountains receive what they may minister to us; therefore, from whence the mountains also receive there should our hope be placed.
When we lift our eyes to the Scriptures, since it was through men the Scriptures were ministered, we are lifting our eyes to the mountains, from whence shall come our help; but still, since they were men who wrote the Scriptures, they did not shine of themselves, but “He was the true light, who lights every man that comes into the world.” A mountain also was that John the Baptist, who said, “I am not the Christ,” lest any one, placing his hope in the mountain, should fall from Him who illuminates the mountain.
He also confessed, saying, “Since of His fullness have all we received.” So you ought to say, “I have lifted up my eyes to the mountains, from whence shall come my help,” so as not to ascribe to the mountains the help that comes to you; but continue and say, “My help is from the Lord, who made heaven and earth.”
Source: Tractates on the Gospel of John (New Advent)