1 Corinthians 1:27–31 (NKJV)
27 But God has chosen the foolish things of the world to put to shame the wise, and God has chosen the weak things of the world to put to shame the things which are mighty; 28 and the base things of the world and the things which are despised God has chosen, and the things which are not, to bring to nothing the things that are, 29 that no flesh should glory in His presence. 30 But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption—31 that, as it is written, “He who glories, let him glory in the Lord.”
The foolish things…confound the wise. The word confound is translated clearly in the NKJV as put to shame. Literally, it means to blush with shame. This shame may not occur in this life, but there is coming a day when men will stand in shame before God; those who have rejected the Savior and were critical of the people God used for His service will be ashamed.
God wants to use those whom the world would consider foolish. He wants those who are humble and those who consider themselves weak. God uses the exact opposite of what the world considers useful. He does it to bring Himself glory, so that no one can boast in and of his own wisdom.
Believers are in Christ Jesus. He is our wisdom, and righteousness, and sanctification, and redemption. We cannot gain any of these things by other worldly means. Therefore, because we are in Christ and not in the world, we should only glory in the Lord, never in anything we have achieved on our own. That means we cannot achieve wisdom, righteousness, sanctification, or redemption. That is why we glory in him and not ourselves.
There is nothing wrong with leaders in the church who have world wisdom and knowledge, but only if their heart is right with God and they consider worldly knowledge as secondary. To God be the glory.