This is only a more particular explication of that which was generally expressed Isaiah 40:3. The sense is, All obstructions shall be removed, and the way made in all respects convenient and easy for the passenger.
Related Commentaries of Isaiah 40:4
Isaiah 40:4
4 Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight,b and the rough places plain: