Acts 13:47

47.As he hath commanded. The place is taken out of Isaiah, where, notwithstanding, God doth rather speak unto his Son than unto the apostles. But we must note, that many things which the Scripture attributeth to Christ do appertain unto his ministers. I say many things; not all things: for there be certain titles proper to the person of Christ, wherewith to adorn the ministers were wicked sacrilege. Christ is called our Righteousness, because he was the only purging sacrifice, (834) and hath reconciled the Father to us by his death, and did rise again afterward, that, having overcome death, he might purchase for us eternal life. Therefore the whole substance of our salvation is in Christ’s person; but inasmuch as he worketh by his ministers, by resigning to them his office, he doth also impart with [to] them his titles. Of this sort is the preaching of the gospel. He alone was appointed by the Father to be our teacher; but he hath put in his place pastors and doctors, who speak, as it were, out of his mouth. So that the authority remaineth wholly to him, and he is nevertheless heard in his ministers. Therefore Paul doth fitly apply unto himself the testimony of Isaiah, where he intreateth of the preaching of the gospel.

I have made thee a light. It should seem that he speaketh in that place of such a calling of the Gentiles as doth not carry with it the casting off of the old people. For God doth rather associate strangers unto the Jews, who were before of the household. It is but a small matter, saith he, that thou be my minister in teaching Israel, because I have made thee a light to the Gentiles. God doth seem to begin his Church among the children of Abraham, and, that done, to reach out his hand to the Gentiles, that they may both make one Church by one consent of faith. But Paul doth in such sort cite the prophecy, as if it could not be fulfilled unless the Jews had been cast off. For he signifieth that the light of Christ was lighted to the Gentiles, after that they were cast into the darkness of death. I answer, that this cannot be necessarily proved out of the text, that Paul doth affirm that the Gentiles could not have been illuminated before the light of the Jews had been put out. For this may be the sense, Forasmuch as you have deprived yourselves of eternal life, there is no cause why ye should think that the grace of God is profaned, if, leaving you, we take care and charge of the Gentiles; for the Messiah is not given to you alone, but he is appointed to be the Savior of the whole world; as it is written, “I have made thee,” etc.; although, if you weigh the place of the prophet more thoroughly, you shall find the casting off of the old people included therein. For God pronounceth that he will be glorious and renowned in the ministry of Christ, though Israel be not gathered together. He addeth afterward, by way of exposition, that the power of Christ shall not be restrained unto one people only, because his light shall shed abroad his beams unto the farthest parts of the world unto salvation. It seemeth that Paul noteth this occasion of calling the Gentiles, namely, because, seeing he found no matter to exercise himself in among the Jews, he gave himself wholly to the Gentiles. We must note this by the way, in the words of the prophet, that salvation is put after light, according to that saying of Christ,

“This is eternal life, to know thee, the true God,” etc.
(John 17:3.)

For if the knowledge of God alone bring to us salvation, it is likewise the only resurrection from destruction of eternal death, for us to be illuminated into the faith of Christ, after that we be delivered from the darkness of ignorance.