1 Corinthians 1:17-18, 21, 30-31

For Christ did not send me [as an apostle] to baptize, but [commissioned and empowered me] to preach the good news [of salvation]—not with clever and eloquent speech [as an orator], so that the cross of Christ would not be made ineffective [deprived of its saving power]. For the message of the cross is foolishness [absurd and illogical] to those who are perishing and spiritually dead [because they reject it], but to us who are being saved [by God’s grace] it is [the manifestation of] the power of God.

For since the world through all its [earthly] wisdom failed to recognize God, God in His wisdom was well-pleased through the foolishness of the message preached [regarding salvation] to save those who believe [in Christ and welcome Him as Savior].

But it is from Him that you are in Christ Jesus, who became to us wisdom from God [revealing His plan of salvation], and righteousness [making us acceptable to God], and sanctification [making us holy and setting us apart for God], and redemption [providing our ransom from the penalty for sin], so then, as it is written [in Scripture], “HE WHO BOASTS and GLORIES, LET HIM BOAST and GLORY IN THE LORD.” [Jer 9:24]