How do we know the doctrine of God's grace is true?

The doctrine of God's grace is underscored throughout the Bible, specifically through the fulfillment of His covenant promises as seen in the life, death, and resurrection of Jesus Christ. God’s faithfulness to His covenant, as shown in passages like Exodus 2:24-25 and in the New Testament, confirms that He remains committed to His people despite their shortcomings. Furthermore, believers are assured of God's grace through His continuous work in our lives, ultimately leading us back to Him whenever we stray. Romans 9:15 asserts that God is sovereign in His decisions regarding mercy, reaffirming the nature of grace as entirely rooted in God's character, not our actions.