How do we know God's 'I will' is true?

The assurance of God's 'I will' being true is rooted in His character. He is sovereign, which means His declarations are not made in haste or under compulsion. They are spoken with deliberate wisdom and authority. His omnipotence supports His promises, indicating that nothing is too difficult for Him. Additionally, God's immutability guarantees that His intentions do not change over time. When He declares 'I will,' it is not a possibility but a certainty; it will come to pass as He is faithful to perform what He has promised.