What does it mean that God's promises are 'yes and amen'?

In 2 Corinthians 1:20, Paul emphasizes that all God's promises in Christ are affirmative—'yes and amen.' This indicates that God's commitments are reliable, and through Christ, these promises are realized. For believers, this assurance invites them to trust in God’s faithfulness and to embrace the hope of salvation. The foundational truth of God's sovereignty means that what He promises will surely come to pass, providing believers with confidence and peace in their relationship with Him.