Covenant is made with an oath that cannot be broken. In ancient times, a covenant oath was sealed in the death of a sacrificial animal. God's everlasting promises are sealed in the blood of His Son (Hebrews 13:20-21). God's promises in the Bible are for you and every believer in Christ.
God's oath promise is forever. Our faith in God, the forgiveness of our sins, our eternal destiny, and God's work in our lives is forever. Forever O LORD, Your word is settled in heaven (Psalm 119:89). God's covenant promises are based upon an oath forever.
God's covenant oath is our guarantee. His oath of covenant promises are for us as believers in Christ. Jesus is our surety or guarantee to the covenant oath that cannot be broken (Hebrews 7:22). The Bible declares God's word is forever settled in heaven. That's God's covenant oath of promise.
God's promises are Yes and Amen for every believer in Christ (2 Corinthians 1:20). Read the covenant promises in the Bible, which are forever the same. God has sworn with a covenant oath, and will not repent. He will not change His mind. God, who cannot lie, promised before time began (Titus 1:2). That's what God promises with an oath to us in Christ.
