We know that Abraham’s father worshipped idols (Joshua 24:2). Scripture records two occasions when Abraham lied to save his own life (Genesis 12, 20). Yet God identifies with him. Why? Why is the Lord willing to say He is the God of Abraham, a sinner? It’s because He’s a God who keeps His promises.
When I was a kid, my friends and I would sometimes add weight to a promise by saying, “Cross my heart, hope to die.” In Genesis 15 God adds weight to His promise by passing through the dead animals, telling Abraham that may what happened to these animals happen to me if either one of us fails to keep the terms of this covenant.
Abraham failed. But on the cross, Jesus died for his sin as well as for me and for all who call on His name. In Christ Abraham was made blameless;
God was delighted to be known as his God.
Jesus is not ashamed to claim us (Hebrews 2:11). If you come to Him, trusting that He has paid for your sin and given you His righteousness, God will never cast you off (John 6:37). He delights to call you His own.