What does the Bible say about the promise given to Abraham?

The promise to Abraham is central to the understanding of God's grace in the Reformed tradition. According to Galatians 3:18, if the inheritance were based on the law, it would not be based on a promise. Instead, God gave Abraham a promise with no conditions attached. This illustrates that the blessings of God are not earned by human effort or obedience but are given freely by His grace. Abraham's faith was simply a response to God's promise, which is an essential aspect of sovereign grace theology. The unconditional nature of God's promise underscores the divine initiative in salvation history.