How do we know God's promises to the church are true?

The truth of God's promises can be assured through His immutable nature, as noted in Jeremiah 17, which claims that 'the heart is deceitful above all things.' Unlike human vows, which may falter, God's commitment to the church is steadfast and eternal. The promises made by God are completed from before the foundation of the world, as seen in Matthew 25:34, ensuring that the blessings prepared for His people are absolute and eternal. Thus, all believers can trust in the divine assurance that His word, and His vows, will never fail.