How does preaching Christ crucified build faith?

Paul explains in 1 Corinthians 2:5 that he preached the message of Christ crucified so that the faith of the believers would stand in the power of God. The preaching of the Gospel serves as a vehicle for the Holy Spirit to work in the hearts of the elect, offering them the gift of faith to believe. When individuals hear the faithful proclamation of Christ's atoning work, they are confronted with the reality of God's grace and the assurance of their salvation, which strengthens and emboldens their faith in God. Such preaching ensures that believers are consistently fed with spiritual truth, helping them to grow in their understanding of Christ and fortifying their faith.