The gospel creates the only kind of grief over sin which is clean and which does not crush. It says: ‘Look at Jesus dying for you! He won’t leave you or abandon you–how then can you respond as you are? He suffered so you wouldn’t do this thing! You are not living as though you are loved! As his child! It is not because he will abandon you that you should be holy, but because this is the one who at inestimable cost to himself has said he won’t ever abandon you! How can you live in the very sin that he was ripped to pieces to deliver you from?’ See the GRACE of God argument? It is the only argument which cannot be answered.
- Timothy Keller