How does Noah's faith exemplify Reformed theology?

Noah's faith exemplifies Reformed theology in that it illustrates the doctrine of justification by faith alone. Genesis 6:9 describes Noah as a just man who walked with God. However, his justification was due not to his faith itself but to the object of his faith—God's grace. In Reformed thought, it is emphasized that faith is a gift from God and does not merit salvation; rather, it is a response to the grace already bestowed. As shown in Hebrews 11:7, Noah demonstrated faith by building the ark, acting on the assurance of God's promise to spare him and his family, thus underscoring the necessity of faith and grace in salvation.