How do we know God's promises are unbreakable?

The certainty of God's promises is rooted in His unchanging nature, as reiterated in 2 Corinthians 1:20, where it is stated that all the promises of God are 'yes' in Christ. This means that if one promise were to fail, it would undermine God's faithfulness and holiness. Romans 3:3-4 addresses the potential objection regarding human unbelief; Paul asserts that God's faithfulness cannot be diminished by human disbelief. Instead, God remains true, and all His promises stand firm, showing His unwavering commitment to those He has chosen.