The Error of Works in the Promise of God

The sermon centers on the peril of human effort in seeking God's promises, using Genesis 16's account of Sarah, Abraham, and Hagar to illustrate how discontentment leads to disobedience and relational breakdown. It highlights the tragic consequences of substituting faith in God's timing with self-reliant schemes, such as Sarah's plan to use Hagar as a surrogate, which results in scorn, division, and spiritual bondage. Drawing from Galatians 4, the preacher contrasts the covenant of works—symbolized by Hagar and Mount Sinai—with the covenant of grace—represented by Sarah and the heavenly Jerusalem—emphasizing that salvation and divine promises come solely through faith, not human striving. The application calls believers to embrace contentment, trust in God's sovereign timing, maintain consistent prayer, and find ultimate satisfaction in Christ's finished work, rejecting the futile attempt to earn divine favor through personal effort.