by John Piper
One of the most precious implications of … confidence in God’s inviolable sovereign will is that it provides the foundation of the “new covenant” hope for the holiness without which we will not see the Lord (Heb. 12:14).
In the old covenant, the law was written on stone and brought death when it was met with the resistance of un-renewed hearts. But the new covenant promise is that God will not let his purposes for a holy people shipwreck on the weakness of human will. Instead, he promises to do what needs to be done to make us what we ought to be.
“And the Lord your God will circumcise your heart and the heart of your offspring, so that you will love the Lord your God with all your heart and with all your soul, that you may live” (Duet. 30:6). “I will put my Spirit within you, and cause you to walk in my statutes and be careful to obey my rules” (Ezek. 36:27). “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” (Jer. 32:40). “Work out your own salvation with fear and trembling, for it is God who works in you, both to will and to work for his good pleasure” (Phil. 2:12-13).”
-John Piper, Does God Desire All to Be Saved? (Wheaton, Illinois: Crossway, 2013), 34-35.