God has never had a Plan B. Before time began, before Adam was created, and before Abraham received his promise, the plan was already in place. Jesus was not a backup solution to humanity's failures. He was always the answer. In Galatians 3, Paul addresses two questions that still challenge believers today: why the God of the Old Testament seems so different from the God of the New Testament, and why Christians do not follow all 613 laws found in the Old Testament. Both questions find their answer in understanding the promise God made to Abraham in Genesis 12, a unilateral, unconditional commitment to bless all the families of the earth through one specific offspring. That offspring, Paul makes clear, was always Christ.

The Law of Moses was never meant to replace or compete with that promise. Just as no one can cancel an irrevocable will, the promise God made to Abraham could not be undone by the arrival of the Law 430 years later. The Law served a different and intentional purpose. It functioned as a guardian, revealing the impossibility of meeting God's perfect standard through human effort and pointing us forward to the only One who could meet it. God's standard has never changed. His holiness is still the measure. But the way that standard is satisfied has always been through Jesus, not through our own performance.

Galatians 3:26-29 makes the promise deeply personal. Through faith in Jesus Christ, every believer becomes a true child of Abraham and an heir of the promise God made thousands of years ago. There is no distinction based on background, ethnicity, or status. The great nation God promised to build through Abraham is the church, every person who has placed their faith in Christ. God is not a God of justice or a God of grace. He is both, fully and perfectly, and He satisfied both at the cross. There has only ever been one God, one story, one promise, and one plan. His name has always been Jesus.