Luke 4:18

By the poor are to be understood the Gentiles; who might truly be called poor, since they possessed neither the knowledge of the true God, nor of the law, nor of the prophets. (Origen) — Isaias in this place speaks of himself, as a figure of the Messias. The captivity of Babylon, which is the literal object of this prophecy, was a figure of the then state of mankind; the return from this captivity announced by the prophet, and effected by Cyrus, represented the redemption of man, effected by Jesus Christ. (Bible de Vence)

(3.) The text he preached upon. He stood up to read, to teach us reverence in reading and hearing the word of God. When Ezra opened the book of the law, all the people stood up (Neh 8 5); so did Christ here, when he read in the book of the prophets. Now the book being delivered to him, [1.] He opened it. The books of the Old Testament were in a manner shut up till Christ opened them, Isa 29 11. Worthy is the Lamb that was slain to take the book, and open the seals; for he can open, not the book only, but the understanding. [2.] He found the place which was appointed to be read that day in course, which he needed not to be directed to; he soon found it, and read it, and took it for his text. Now his text was taken out of Isa 61 1, 2, which is here quoted at large, v. 18, 19. There was a providence in it that that portion of scripture should be read that day, which speaks so very plainly of the Messiah, that they might be left inexcusable who knew him not, though they heard the voices of the prophets read every sabbath day, which bore witness of him, Acts 13 27. This text gives a full account of Christ's undertaking, and the work he came into the world to do. Observe,

Verses 14-30 Christ taught in their synagogues, their places of public worship, where they met to read, expound, and apply the word, to pray and praise. All the gifts and graces of the Spirit were upon him and on him, without measure. By Christ, sinners may be loosed from the bonds of guilt, and by his Spirit and grace from the bondage of corruption. He came by the word of his gospel, to bring light to those that sat in the dark, and by the power of his grace, to give sight to those that were blind. And he preached the acceptable year of the Lord. Let sinners attend to the Saviour's invitation when liberty is thus proclaimed. Christ's name was Wonderful; in nothing was he more so than in the word of his grace, and the power that went along with it. We may well wonder that he should speak such words of grace to such graceless wretches as mankind. Some prejudice often furnishes an objection against the humbling doctrine of the cross; and while it is the word of God that stirs up men's enmity, they will blame the conduct or manner of the speaker. The doctrine of God's sovereignty, his right to do his will, provokes proud men. They will not seek his favour in his own way; and are angry when others have the favours they neglect. Still is Jesus rejected by multitudes who hear the same message from his words. While they crucify him afresh by their sins, may we honour him as the Son of God, the Saviour of men, and seek to show we do so by our obedience.