Charles H. Spurgeon wrote, "The whole burden of our salvation rests upon the faithfulness of our covenant God. The whole matter of salvation is centered on the attribute of God's great faithfulness."
We are saved because God is faithful to the everlasting covenant (Hebrews 13:20-21). God is faithful to covenant promises for every believer (Hebrews 8:10-13). He is faithful to keep his covenant promises. God has bound himself to his people forever with his oath of covenant promises.
We are saved because God is faithful to covenant promises fulfilled in the gospel. Jesus died on the cross as the everlasting covenant sacrifice. God is faithful to forgive and cleanse us from all sin, through the blood of Jesus (1 John 1:7-9). The power of God's covenant promises are proven forever through the resurrection of the Lord Jesus Christ.
We are saved because God is faithful to all his covenant promises in Christ (2 Corinthians 1:20).. God will not break his covenant word. He has sworn with an oath. Our faith stands upon our covenant God's faithfulness. That's God's oath of promise. To doubt God's word in the Bible is to doubt his great faithfulness.
We are saved and sure, because God is faithful to his promises in the Bible. Our assurance is based upon God's great faithfulness. The evidence is the resurrection of our Lord Jesus Christ, as the believer's covenant surety (Hebrews 7:20-22). God is faithful to make our salvation sure in Christ.
