1. The Babylonian captors made the captive3s sing their worship songs. (even though the Babylonian people were going to take the Jewish people away from their roots, they really admired the worship songs that they sang - and forced them to entertain them with these songs of praise).
2. We need to remember where we came from (prior to becoming Christians we did awful things in our life as well. The author is reminding us that we should always remember where we came from - and hopefully learn from our mistakes and begin behaving differently0.
3. We should pray for those who have wronged us (rather that curse the people (as the author suggests we do) I recommend that we do what Jesus told us to do (in His sermon on the mount - that we should love our enemies, and that we should pray for those that wrongfully persecute us.

