Isaiah 40:4

4 Every valley will be raised up, and every mountain and hill will be flattened. Uneven ground will become level, and rough terrain a valley plain.

Isaiah 40:4 Meaning and Commentary

Isaiah 40:4

Every valley shall be exalted, and every mountain and hill
shall be made low
Which is not to be understood literally, but, as Kimchi says, parabolically and mystically: the meaning is, that in consequence of John's ministry, and our Lord's coming, such who were depressed and bowed down with the guilt of sin, and were low and humble in their own eyes, should be raised up and comforted; and that such who were elated with themselves, and their own righteousness, should be humbled; their pride and haughtiness should be brought down, and they treated with neglect and contempt, while great notice was taken of lowly minded ones; see ( Luke 14:11 ) and ( Luke 18:14 ) : and the crooked shall be straight and the rough places plain;
what before was dark and intricate in prophecy should now become clear; and such doctrines as were not so well understood should now become plain and easy.

Isaiah 40:4 In-Context

2 Speak compassionately to Jerusalem, and proclaim to her that her compulsory service has ended, that her penalty has been paid, that she has received from the LORD's hand double for all her sins!

3 A voice is crying out: "Clear the LORD's way in the desert! Make a level highway in the wilderness for our God!

4 Every valley will be raised up, and every mountain and hill will be flattened. Uneven ground will become level, and rough terrain a valley plain.

5 The LORD's glory will appear, and all humanity will see it together; the LORD's mouth has commanded it."

6 A voice was saying: "Call out!" And another said, "What should I call out?" All flesh is grass; all its loyalty is like the flowers of the field.