Real change comes from the Lord.
We do not see Abraham in a good light here. There is, in this incident, a reminder of the deceitfulness of the human heart (Jeremiah 17:9). Our only hope of real change is in the Lord who says, "I will give you a new heart and put a new spirit in you. I will remove your stubborn hearts and give you obedient hearts" (Ezekiel 36:26). In the human heart, there is conflict - the flesh and the Spirit wrestling with each other (Galatians 5:17). If the Spirit is to display the victory of Christ in our lives, we must "put on the whole armour of God", receiving "power from the Lord and from His mighty strength" (Ephesians 6:10-11). This strength comes in this way: "take salvation as your helmet and the Word of God as the sword that the Spirit supplies" (Ephesians 6:17).