Commentaries:
Jamieson, Fausset, and Brown
crooked . . . straight— (Isaiah 40:4), rather, "maketh mountains plain" [LOWTH], that is, clear out of thy way all opposing persons and things. The Keri reads as in Isaiah 45:13, "make straight" (Margin).
gates of brass— (Psalms 107:16). HERODOTUS (1.179) says, Babylon had a hundred massive gates, twenty-five on each of the four sides of the city, all, as well as their posts, of brass.
bars of iron—with which the gates were fastened.
Other Jamieson, Fausset, and Brown entries containing Isaiah 45:2:
Psalms 107:16
Ecclesiastes 1:15
Isaiah 41:2
Isaiah 45:1
Isaiah 54:16
Jeremiah 25:26
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