Brothers, consider the time of your calling: Not many of you were wise by human standards; not many were powerful; not many were of noble birth.
Paul asks the brothers to consider their calling: not many of them were wise, powerful, or of noble birth by human standards.
It turns the argument toward the Corinthians' own story.
26Brothers, consider the time of your calling: Not many of you were wise by human standards; not many were powerful; not many were of noble birth. 27But God chose the foolish things of the world to shame the wise; God chose the weak things of the world to shame the strong. 28He chose the lowly and despised things of the world, and the things that are not, to nullify the things that are, 29so that no one may boast in His presence. 30It is because of Him that you are in Christ Jesus, who has become for us wisdom from God: our righteousness, holiness, and redemption. 31Therefore, as it is written: “Let him who boasts boast in the Lord.”