What does 1 Corinthians 1:30 mean?
Paul has written in the previous verses that, as we stand before God on judgment day, all the important and high-status people in this life who rejected faith in Christ as weak and foolish will become "nothings." They will stop boasting about their wisdom and strength once and for all. They'll be confronted with the reality that their rejection of Him was based in pride and arrogance, not facts or reason (James 2:19; Romans 1:18–23).Those who God chooses to believe in Christ will also not boast. We will understand our faith, our place in Christ Jesus, to be a gift from God.
We will know that it is Christ who is the wisdom of God in human form. He is the one who made it possible for us to be declared righteous by God because we are in Christ and He is righteous. Christ is the reason we have been sanctified, meaning that God has set us apart as His own special possession (1 Corinthians 1:2). It is with Christ's death for our sins that God has redeemed us, purchased us out of our slavery to sin, and welcomed us into His family as sons and daughters.