Why is the concept of the two covenants important for Christians?

The doctrine of the two covenants is crucial for Christians as it delineates the differences between living under the law and living under grace. The covenant of works, exemplified by Hagar, brings condemnation and demonstrates human inability to achieve righteousness. In stark contrast, the covenant of grace, represented by Sarah, offers forgiveness and eternal life through Christ’s redemptive work. Recognizing this distinction enables believers to understand that they are not bound by the law, which cannot save, but are free through faith in Christ who fulfilled the law. This understanding fosters humility and gratitude, leading to deeper worship and reliance on God's grace rather than personal effort.