Last Sunday Thane Glenn gave a talk on compassion at the Sunday Night Thing. I missed it because I was out of town but someone recorded it so I just listened to it this afternoon and it was really useful to me.
The main passage he was working from was Arcana Coelestia 6737, which is just a great passage. Thane really brought it to life by touching on lots of cool examples of compassion from the Old and New Testaments. He suggested a useful approach to trying to be more compassionate but what I particularly appreciated was how, at the end, he talked about the Lord's compassion and mercy.