Luke 3:5

As messenger of God, who was about to come, He faithfully observed this law, constructing well, That every hill might low become and tough ways plain, Lest when the truth should glide from heaven down to earth It then would find a barrier to its …

It is also shown thirdly to have the office of consoling through promise, when it is added: Every valley etc.; in which he foretells the effect of Christ's coming with respect to the humble just, with respect to sinners, and with respect to all. — …

Every valley shall be filled, and every mountain and hill shall be brought low. What is designated by the name of valleys in this place except the humble, what by mountains and hills except proud people? At the coming of the Redeemer, therefore, valleys were filled, but mountains and hills were brought low, because according to his voice: Everyone who exalts himself will be humbled, and everyone who humbles himself will be exalted. For a valley that is filled grows, but a mountain and hill that is brought low decreases, because indeed in the faith of the Mediator of God and men, the man Christ Jesus, the Gentiles received the fullness of grace, while Judea through the error of unbelief lost that by which it was puffed up. For every valley shall be filled, because the hearts of the humble will be filled with the grace of virtues through the eloquence of sacred teaching, according to what is written: He sends forth springs in the valleys. And from which again it is said: And the valleys shall abound with grain. For water flows down from mountains; because the teaching of truth abandons proud minds. But springs rise in the valleys, because humble minds receive the word of preaching. […]

The text continues: "And the crooked shall be made straight, and the rough ways shall be made smooth." The crooked are made straight when the hearts of the wicked, twisted by injustice, are directed to the rule of justice. And the rough are changed into smooth ways when harsh and wrathful minds, through the infusion of heavenly grace, return to the gentleness of meekness. For when the word of truth is not received by a wrathful mind, the roughness of the path, as it were, repels the step of one journeying. But when a wrathful mind, through the received grace of meekness, accepts the word of correction or exhortation, there the preacher finds a smooth way where previously, because of the roughness of the path, he was unable to proceed—that is, to set the step of preaching.

(20. in Ev.) Or, the valley when filled increases, but the mountains and hills when brought low decrease, because the Gentiles by faith in Christ receive fulness of grace, but the Jews by their sin of treachery have lost that wherein they boasted. For the humble receive a gift because the hearts of the proud they keep afar off.

Then it is as if someone asked: how shall we accomplish this? For virtue is not easy to fulfill and encounters many snares and obstacles both from the evil powers and from the passions dwelling in us. He answers that nothing will be difficult, but …

Every valley shall be filled, and every mountain and hill shall be made low. What else is meant by the term valley in this place but the humble; what else by mountains and hills but proud men? At the coming of the Redeemer, therefore, the …

The crooked shall be made straight, and the rough ways shall be made smooth. The crooked are made straight when the hearts of the wicked, twisted by injustice, are guided to the rule of justice. The rough ways are made smooth when harsh and irascible …

(ubi sup.) But the crooked places are become straight, when the hearts of the wicked, perverted by a course of injustice, are directed to the rule of justice. But the rough ways are changed to smooth, when fierce and savage dispositions by the influence of Divine grace return to gentleness and meckness.

But it seems rather to be meant of the gospel of Christ, of which that was the introduction. The humble shall by it be enriched with grace: Every valley that lies low and moist shall be filled and be exalted.

Every valley shall be filled,....

Every they shall be filled - All hinderances shall be taken out of the way: a quotation from the Greek version of Isa 40:4, containing an allusion to the preparations made in rough countries to facilitate the march of mighty kings and conquerors. See the instance produced on Mat 3:3 (note).

Every valley, &c.--levelling and smoothing, obvious figures, the sense of which is in the first words of the proclamation, "Prepare ye the way of the Lord."

These verses describe the beginning of the Gospel of Christ. It began with the preaching of John the Baptist. The Jews could never say, that when Messiah came, He came without notice or preparation. He graciously sent a mighty forerunner before His face, by whose ministry the attention of the whole nation was awakened. Let us notice first, in this passage — the wickedness of the times when Christ's Gospel was brought into the world.

These verses describe the beginning of the Gospel of Christ. It began with the preaching of John the Baptist. The Jews could never say, that when Messiah came, He came without notice or preparation. He graciously sent a mighty forerunner before His face, by whose ministry the attention of the whole nation was awakened. Let us notice first, in this passage — the wickedness of the times when Christ's Gospel was brought into the world. The opening verses of the chapter tell us the names of some who were rulers and governors in the earth, when the ministry of John the Baptist began. It is a melancholy list, and full of instruction. There is hardly a name in it which is not infamous for wickedness . Tiberius, and Pontius Pilate, and Herod, and his brother, and Annas, and Caiaphas — were men of whom we know little or nothing but evil. The earth seemed given into the hands of the wicked. (Job 9:24.) When such were the rulers — then what must the people have been? Such was the state of things when Christ's forerunner was commissioned to begin preaching. Such were the times when the first foundation of Christ's church was brought out and laid. We may truly say, that God's ways are not our ways. Let us learn never to despair about the cause of God's truth — however black and unfavorable its prospects may appear . At the very time when things seem hopeless — God may be preparing a mighty deliverance. At the very season when Satan's kingdom seems to be triumphing, the "little stone, cut without hands," may be on the point of crushing it to pieces. The darkest hour of the night — is often that which just precedes the day. Let us beware of slackening our hands from any work of God, because of the wickedness of the times , or the number and power of our adversaries. "He who observes the wind shall not sow — and he who regards the clouds shall not reap."