How do we know God's promises are true despite unbelief?

Paul addresses the question of whether human unbelief can nullify God's word in Romans 3:3, asserting that it does not. Unbelief, while present in the hearts of some, does not invalidate God's promises or the truth of His word. The conviction that God remains true, even amidst human disbelief, reinforces the sovereignty of God's revelation and the certainty of His judgments. Paul emphatically declares, 'God forbid,' highlighting that the faithfulness of God stands independent of human rejection or doubt. God's promises and covenant remain funded in His truth and assure His people of their standing.