Paul is addressing the Galatians to clarify the nature of God's promise to Abraham. He explains that the inheritance promised to Abraham and his descendants is not contingent upon following the law but is a result of God's promise. This distinction is crucial because it underscores the principle of grace. God's promise to Abraham was given freely, not as a reward for compliance with the law. This promise is fulfilled through faith, not through human efforts or adherence to the law.
By emphasizing grace, Paul reassures believers that their relationship with God is based on faith and trust in His promises, not on their ability to perfectly follow the law. This teaching encourages Christians to focus on their faith and the grace that God offers, rather than becoming entangled in legalistic practices. It highlights the transformative power of grace, which liberates believers from the burden of trying to earn God's favor and instead invites them to live in the freedom and assurance of His love and promises.