Isa 40:4, 45:2 | JFB | STEP | 4. Eastern monarchs send heralds before them in a journey to clear away obstacles, make causeways over valleys, and level hills. So John's duty was to bring back the people to obedience to the law and to remove all self-confidence, pride in national privileges, hypocrisy, and irreligion, so that they should be ready for His coming ( ). crooked

Isaiah 40:4

4. Eastern monarchs send heralds before them in a journey to clear away obstacles, make causeways over valleys, and level hills. So John's duty was to bring back the people to obedience to the law and to remove all self-confidence, pride in national privileges, hypocrisy, and irreligion, so that they should be ready for His coming (Mal 4:6; Lu 1:17).

crooked—declivities.

Isaiah 45:2

2. crooked . . . straight— (Isa 40:4), rather, "maketh mountains plain" [LOWTH], that is, clear out of thy way all opposing persons and things. The Keri reads as in Isa 45:13, "make straight" (Margin).

gates of brass— (Ps 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.