What does it mean that all of God's promises are 'yay and amen'?

The phrase 'yay and amen' as found in 2 Corinthians 1:20 emphasizes the certainty and affirmation of God's promises. 'Yay' expresses a strong affirmation, while 'amen' serves as a declaration of truth. This assures believers that God's covenants and declarations are not subject to change or doubt. They are firmly rooted in Christ, who is the embodiment of God's faithfulness. The truth that God cannot lie, as affirmed in Titus 1:2, bolsters the believer's confidence that every promise made will be fulfilled. This understanding fosters a deeper trust in God’s word and encourages believers to rest in the assurance that God's commitments hold true.