As the story goes, Isaac was old, and blind, and near death and asked Esau to hunt and cook him some game in order to bless him before his passing. Rebekkah hears this and instructs Jacob to put on some of Esau's garments and take some game into him which she would prepare. In this way, Jacob would receive the blessing.
Expectedly, Jacob complies and follows through with it. Isaac is confused at first because he "feels" Esau's hairy hands (the sheep's skin) but hears Jacob's voice. But when he catches a whiff of Esau's clothes he is convinced that it is his elder son and goes through with the blessing.
In time Esau returns and discovers he has been swindled–again! He vows to kill his twin and Rebekkah, fearing for her son, sends him away under the guise of marrying one of her kinsman rather than the native Caananites.
This is where it gets interesting: Jacob leaves his home and stops for the night in Bethel (at the time it was called Luz). He has his famous dream of the angels ascending and descending from Heaven on a ladder. In the dream God comes to him and makes him this promise:
Here is where the reflection comes in. God introduces Himself by declaring that He was the God of his fathers. He then follows that up with a covenant. He promises to be with Jacob and fulfill His covenant with him and his offspring.I am the Lord, the God of Abraham your father and the God of Isaac...Behold, I am with you and will keep you wherever you go, and will bring you back to this land. For I will not leave you until I have done what I have promised you.” (Gen 28:13, 15).
Think about that for a minute. Jacob had just cheated his brother and yet God was honoring Jacob. Not that God approved of his cheating. But God had intended Jacob to be the heir of promise. He was still honoring that despite Jacob's past sins. The promise wasn't conditioned on Jacob's behavior. No! It was conditioned on God Himself.
Let's bring that principle home: I am an idolatrous, image-making, God-blaspheming, Sabbath breaking, parent dishonoring, murdering, adulterous, thieving, lying, covetous man.
Yet, God has a covenant with me. His Word has assured me that if I repent of my sins and in faith trust the finished work and Person of Christ for salvation then He, like Jacob, would "be with me and bring me again into [His] land". He has promised me that His Son has gone to prepare a place for me (John 14:3) and that He will continue to abide with me (John 14: 15-17).
But I fail daily! I sin, I miss the mark, and I defame His Holy Name. Yet, He has even promised that all I must do is to confess and forsake my sin (1John 1:9).
Why? Because it is not up to me or my faithfulness which God basis His promises on. It is upon His own Name and the covenant which He made with His people from eternity past.
Friend, if you are struggling with doubt and fear, and if you have truly trusted in Christ alone for salvation, know that God will lead you to your eternal inheritance. And this is not contingent upon your own faithfulness but in God's covenant keeping Name!
Amen & Amen