And I will make an everlasting covenant with you, the sure mercies of David (Isaiah 55:3). God's everlasting covenant promises a personal relationship with believers. It is God's revealed will to extend mercies to all who believe. God made covenant with David concerning the coming of Christ (2 Samuel 7:12-16). God's covenant with believers includes sure mercies fulfilled in our Lord Jesus Christ.
Sure mercies for you are through Christ our Shepherd (Hebrews 13:20-21). God's oath of promise is sure mercies for you through faith in Christ. It's God's sworn promise through the everlasting covenant. Simply stated, covenant means that God will never change His mind.
Sure mercies for you are confirmed at the cross of Jesus. He died for your sins (1 Corinthians 15:1-4). God accepted the sacrifice of Jesus in your place. God declared it to be true by raising Jesus from the dead (Romans 10:9). All who believe the gospel of Christ are in the everlasting covenant with God.
Sure mercies gives you cleansing from all sin through Jesus Christ (1 John 1:7-9). The covenant with God in our Lord Jesus Christ saves and cleanses all who believe (Acts 16:31). God's everlasting covenant is sure mercies for you by faith in Christ.