Jeremiah 32:40 “I will make with them an everlasting covenant, that I will not turn away from doing good to them. And I will put the fear of me in their hearts, that they may not turn from me. 41 I will rejoice in doing them good, and I will plant them in this land in faithfulness, with all my heart and all my soul.”

The ground of our assurance of final perseverance and salvation is a covenant keeping God. Dr. John Piper explains in this 3 minute video excerpt:

We Should Learn This Verse from Desiring God on Vimeo.