The gospel transforms us in heart, mind, will, and actions precisely because it is not itself a message about our transformation. Nothing that I am or that I feel, choose, or do qualifies as Good News. On my best days, my experience of transformation is weak, but the gospel is an announcement of a certain state of affairs that exists because of something in God, not something in me; something that God has done, not something that I have done; the love in God’s heart which he has shown in his Son, not the love in my heart that I exhibit in my relationships.
...In fact, our sanctification is simply a lifelong process of letting that Good News sink in and responding appropriately; becoming the people whom God says that we already are in Christ.
- Michael Horton
The Gospel-Driven Life
(Grand Rapids, Mi.: Baker Books, 2009), 77