Jamieson, Fausset & Brown

as it is written-- (Isa 52:7). How beautiful are the feet of them that preach the gospel of peace, &c.--The whole chapter of Isaiah from which this is taken, and the three that follow, are so richly Messianic, that there can be no doubt "the glad tidings" there spoken of announce a more glorious release than of Judah from the Babylonish captivity, and the very feet of its preachers are called "beautiful" for the sake of their message.