Faith in the gospel ...

Faith in the gospel restructures our motivations, our self-understanding, our identity, and our view of the world. Behavioral compliance to rules without heart-change will be superficial and fleeting… We can only change permanently as we take the gospel more deeply into our understanding and into our hearts. We must feed on the gospel, as it were, digesting it and making it part of ourselves. That is how we grow.
Faith in the gospel restructures our motivations, our self-understanding, our identity, and our view of the world. Behavioral compliance to rules without heart-change will be superficial and fleeting… We can only change permanently as we take the gospel more deeply into our understanding and into our hearts. We must feed on the gospel, as it were, digesting it and making it part of ourselves. That is how we grow.

Quotes from the same author

Gifts are abilities God gives us to meet the needs of others in Christ’s name.
The main human problems often are that we misidentify what will make us happy; and we ask people and things to save us beyond their ability.
Our moral efforts are too feeble and falsely motivated to ever merit salvation.
Without the gospel we hate ourselves instead of our sin. Without the gospel we’re motivated through all sorts of awful fear and pride to change and it doesn’t really change our hearts; it just restrains our hearts.
Christians tend to motivate others with guilt. We tend to say: You would do this if you were really committed Christians, indicating that we are committed and all that is needed is for others to become as good as we are! This is why so many churches quench the motivation of people for ministry. In our shoes, Paul would say: Remember the grace God has showered on you—what does living out and enjoying that grace look like in this situation?