How do we know God is able to perform His promises?

The assurance of God's ability to perform His promises is grounded in His nature as an omnipotent being. Romans 4:21 highlights Abraham's conviction that 'what God had promised, He was able to perform.' This isn't based on human reasoning but rests entirely on the character of God. When God speaks, He does not just express hope; He commands reality. Hebrews 11:11 affirms this when it states that 'Sarah herself received strength to conceive seed' because she judged Him faithful who had promised. Thus, the demonstration of God's power throughout Scripture—from creation to the resurrection of Christ—serves as a confirmation of His capability to fulfill all that He has covenanted.