CALLED TO BE AN APOSTLE.
The first question which occurs to us concerns the name Paul itself. Why is he, who in Acts[1] was called Saul, now called Paul? In Holy Scripture we find that among the ancients, many names were altered, e.g., Abram was renamed Abraham,[2] Sarai became Sarah,[3] and Jacob became Israel.[4] In the Gospels too, Simon was changed to Peter,[5] and the sons of Zebedee became known as sons of thunder.[6] But these things occurred by divine command, and we read nothing of the sort in the case of Paul. Because of this, some people have imagined that the apostle took the name of Paul, the proconsul of Cyprus, whom he converted to the Christian faith,[7] in the same way that rulers are in the habit of adding the names of conquered peoples to their titles, e.g., Parthicus would indicate someone who conquered the Parthians, Gothicus a victor over the Goths, and so on. In the same way the apostle would have called himself Paul to indicate that he had conquered the proconsul Paul.
We cannot exclude this reason completely, but given that no such custom can be found in Holy Scripture, we ought rather to seek a solution from the examples which we do have. And indeed we find in the Scriptures that some people have two or even three different names, e.g., Solomon is also called Jedidiah,[8] Zedekiah is also called Mattaniah,[9] Uzziah is also called Azariah,[10] and there are many others in the books of Judges, Samuel and Kings who have double names. But even the Gospels do not abandon this custom, e.g., Matthew was called Levi[11] . . . and Thaddeus sometimes appears as Lebbaeus.[12] Obviously the Gospel writers did not get the names of the apostles wrong, but given that it was the custom of the Hebrews to have two or three names, they gave different names to one and the same man. It seems to us that it is in accordance with this custom that Paul appears to have a second name, and that as long as he was ministering to his own people he was called Saul, which was probably the name his parents gave him, but that when he was writing laws and commandments for the Greeks and other Gentiles, he was called Paul. Scripture makes it clear when it says: Saul, who is also called Paul,[13] that the name Paul was not then being given to him for the first time but was already habitual.
But why does Paul call himself a slave, when elsewhere he says: For you did not receive the spirit of slavery to fall back into fear, but you have received the Spirit of sonship, by which we cry Abba! Father![14] . . . We may understand this as an expression of humility . . . and that would not be wrong. Nor is the reality of Paul’s freedom compromised by this in any way. As he himself says: Though I am free from all men, I have made myself a slave to all.[15]. . . For he serves Christ not in the spirit of slavery but in the spirit of adoption, for Christ’s service is more noble than any freedom.
Called is the name given to everyone who believes in Christ and is therefore a general term, although it is applied to each one according to what God has foreseen and chosen in him. He may be called to be an apostle or a prophet or a teacher; as free from a wife or as bound in marriage, and this is determined by the diversity of grace given to everyone, as it is written: Many are called but few are chosen.[16]
In Paul’s case, he was not called to be an apostle in the general sense, but he was also chosen according to the foreknowledge of God to be set apart for the gospel of God, as he says elsewhere: God set me apart before I was born and called me through his grace.[17] Heretics wrongly claim that he was set apart from his mother’s womb on account of the goodness of his nature, just as from the opposite side of the fence we read in the Psalms of those sinners who were separated from the womb[18] because of their evil nature.
But we say that Paul was chosen neither by accident nor because of some natural difference, but he himself attributed the causes of his election to him who knows everything before it happens. . . . For God foresaw that Paul would labor more abundantly than anyone else in the gospel . . . and for that reason Jesus set him apart in his mother’s womb for the gospel. Had he been chosen by fate, as the heretics maintain, or by some inherently better nature, he would not have been afraid of being condemned if he failed to preach the gospel.[19]
God’s foreknowledge, by which those who will labor and succeed are known, comes first, and his predestination follows afterwards, so that foreknowledge cannot be regarded as the cause of predestination. With men, merits are weighed according to past actions, but with God they are weighed according to future behavior, and anyone who thinks that God cannot see our future just as easily as he can see our past is an unbeliever.
Commentary on the Epistle to the Romans