Galatians 2:6

[He means] those who have sprung from those same pseudoapostles but nonetheless "are something," that is, have undergone change and now follow the gospel. Even if they have sprung from these phonies they are now whole, for that is what it is truly to be something. "It is nothing to me," he says, "what kind of people they were before, at some past time." And he adds the reason: God shows no partiality but looks at one's mental attitude and faith. Whether one be Greek or Jew, whether one was anything, is not what God accepts, but what one is and whether one has received faith and the gospel.

He says 'those who thought of themselves to be' instead of 'those who were.' As he said about himself, I think that I too have the Spirit of God. The sense is this: I do not know, he says, nor do I contest about, the reason, which made those around Peter condescend to circumcision; they know, for they shall have to give an account to God. As for me I know one thing, that when I came, they no longer said anything about the preaching. He was right in saying, "whatever they might be," for they were not anything, so that he might offer the condescension to the beginning of his preaching and to them.

If people were reputed to be anything, that was a human reputation, for they themselves are not anything to boast of. For even if they are good ministers of God, it is Christ in them, not they through themselves, who are something. For if they were something through themselves they would always be something. "What they were" at one time means that it is nothing to him that they themselves were sinners. God accepts no one because of the office one holds. He calls all to salvation, not imputing their transgressions to them.… No one should suppose that Paul said [this] to disparage his predecessors, for they too, as spiritual people, wished to stand against the carnal people who thought themselves to "be something" on their own rather than out of Christ in them. They were extremely glad when persuaded that they themselves, Paul's predecessors, like Paul had been justified by the Lord from a state of sin. But carnal people, if anything is said about their previous life, grow angry and take it as disparagement. So they assume that the apostles are of their own mind. Now Peter, James and John were more honored among the apostles because the Lord showed himself on the Mount to these same three as a sign of his kingdom.