How do we know the truthfulness of God's promises?

The truthfulness of God's promises is grounded in His unchanging and faithful nature. As stated in Numbers 23:19, God is not a man that He should lie, nor a son of man that He should change His mind. When He speaks, He acts, and when He promises, He fulfills. In Psalm 138:2, David praises God for His truth and lovingkindness, recognizing that God's Word is the ultimate expression of His covenant faithfulness. This assurance is echoed in 2 Peter 3:9, where we learn that the Lord is not slow in keeping His promise, but patient, desiring that none should perish. Therefore, we can trust that all of God's promises find their fulfillment in Christ, who is the embodiment of God's truth and grace.