The Pulpit Commentary - Isaiah 57:14
The ministry of angels. Without intruding it on the reader's attention, Isaiah is continually implying the interest which angels take in all God's dealings with his Church, and the assistance which they render. Voices fill the heavenly sphere around him and about him, which can only be angelic utterances, and from time to time he records the sayings. Sometimes he records them openly as angelic; e.g. the seraph's words, when he took the live coal from the altar in the court of heaven, and... read more
The Pulpit Commentary - Isaiah 57:14
And shall say; rather, and one said. The prophet hears a voice, saying, Cast ye up, cast ye up ; i.e. make a highway to the holy mountain by heaping up material ( Isaiah 62:10 ); and, having made it, remove every obstruction from the path of my (righteous) people. The voice is, probably, an angelic one. read more