How do we know that God can fulfill His promises?

God's ability to fulfill His promises is rooted in His nature as all-powerful. In Genesis 17:1, God states to Abraham, 'I am the almighty God,' indicating His supreme power to accomplish what He has promised. Unlike humans, who may falter in their commitments, God is infallible and does not promise what He cannot achieve. His past faithfulness serves as a testament to His capability, as seen in biblical history. Understanding God's character reassures believers of His unwavering commitment to His word, which is crucial for faith in salvation.