At the cross, we see the worst that sin can do, as humanity - of which each one of us is a part - crucified the Lord. But at the cross, we also see that the most that sin can do cannot thwart God's salvation.
Timothy KellerOnly if you first seek inner forgiveness will your confrontation be temperate, wise, and gracious. Only when you have lost the need to see the other person hurt will you have any chance of actually bringing about change, reconciliation, and healing. You have to submit to the costly suffering and death of forgiveness if there is going to be any resurrection.
Timothy KellerUnless we believe the gospel, we will be driven in all we do-whether obeying or disobeying-by pride ('self-love') or fear ('of damnation'). Apart from 'grateful remembering' of the gospel, all good works are done then for sinful motives. Mere moral effort may restrain the heart, but does not truly change the heart. Moral effort merely 'jury rigs' the evil of the heart to produce moral behavior out of self-interest. It is only a matter of time before such a thin tissue collapses.
Timothy KellerThe sin that is most destructive in your life right now is the one you are most defensive about.
Timothy Keller