Vocation, is here used for the called, as Romans iii. 30. circumcision for the circumcised, (Romans xi. 7.) election for the elected. (Bible de Vence)

Consider your manner of being called; not many, hitherto, of those who have believed, or of those who have preached the gospel, are wise according to the flesh, or as to worldly wisdom; and in the esteem of men, not many mighty, not many noble. God hath chosen such as are looked upon as illiterate, without power, without riches, without human wisdom, to confound the great and wise men: He hath chosen the things that are not, that is, says St. Chrysostom, men reputed as nothing, of no consideration, to confound, to destroy, to make subject to him, and to the gospel, men who had the greatest worldly advantages, that no flesh, no men how great, wise, rich, or powerful soever, might glory in his sight, or attribute their call, and their salvation to their own merits.

From him you are in Christ Jesus brought to believe in him, who is made to us wisdom, acknowledged to be the wisdom of his eternal Father, by whom we have been justified, sanctified, redeemed. We have nothing of ourselves to boast of, and can only glory in the Lord. (Witham)

And the mean things. In the beginning of Christianity, it was frequently objected to the Christians, that they had none but men of the basest extraction. The emperor Julian likewise made the Catholics the same reproach. (Grotius)

But this objection was not founded; for we find many persons of consideration mentioned in the Scriptures, who had embraced Christianity. Witness, ver. 1. of this chap., Sosthenes, the head of the synagogue at Corinth, and some in the very palace of Cæsar.