How does Abraham's faith relate to salvation for Gentiles?

In Romans 4, Paul illustrates that Abraham's faith was the precursor to salvation for all through grace. His belief was not limited by ethnic lineage; rather, it became the basis for God's covenant with both Jews and Gentiles. Paul emphasizes that Abraham is the father of many nations, signifying that salvation through faith is inclusive, per God's promise. This theological principle is foundational, showcasing that all who share the faith of Abraham, regardless of background, can partake in salvation. It affirms the unity of believers in Christ, making Abraham a spiritual father to all who believe.