Isaiah 40:4

John Cassian

• John Cassian, Conferences XVIII–XXIV XXIV.25Conference XXIV

  “For to them at once “the crooked shall become straight and the rough ways plain;” and they shall “taste and see that the Lord is gracious,” and when they hear Christ proclaiming in the gospel: “Come unto Me all ye that labour and are heavy laden, and I will refresh you,” they will lay aside the…” — editor's note: Jer. vi. 16; Isa. xl. 4; Ps. xxxiii. (xxxiv.) 9.

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Justin Martyr

• Justin Martyr, Dialogue with Trypho Chapter 50

  “But Lebanon is not sufficient to burn, nor the beasts sufficient for a burnt-offering; and all the nations are considered nothing, and for nothing.’ ”” — editor's note: Isa. xl. 1–17.

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Tertullian

• Tertullian, The Five Books Against Marcion V.3Book V

  ““To redeem them that were under the law,” in other words, to “make the crooked ways straight, and the rough places smooth,” as Isaiah says—in order that old things might pass away, and a new course begin, even “the new law out of Zion, and the word of the Lord from Jerusalem,” and “that we might…” — editor's note: Isa. xl. 4.

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Cyprian of Carthage

• Cyprian of Carthage, Three Books of Testimonies Against the Jews II.7Book II

  “Every channel shall be filled up, and every mountain and hill shall be made low, and all crooked places shall be made straight, and rough places plain; and the glory of the Lord shall be seen, and all flesh shall see the salvation of God, because the Lord hath spoken it.”” — editor's note: Isa. xl. 3–5.

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Augustine of Hippo

• Augustine of Hippo, Tractates on the Gospel of John Tractate 7

  ““All flesh is grass, and all the goodliness thereof as the flower of the field: the grass withereth, the flower fadeth; but the word of the Lord abideth forever.”” — editor's note: Isa. xl. 1–8.

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• Jeremiah 1:18

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Jeremiah 1:19

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Jeremiah 6:16

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Ezekiel 18:25

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Matthew 11:28

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Matthew 11:29

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Matthew 11:30

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Psalm 34:9

  Cited together in Conferences XVIII–XXIV XXIV.25.

• Proverbs 19:3

  Cited together in Conferences XVIII–XXIV XXIV.25.