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)