IMO,
The law keeping aspect of the Christian life is out of a spirit of gratitude. The Laws Hold us as guilty before them, point us to the grace found in Christ who fulfilled the laws demands, and shows us what a life of pleasing service looks like. As a Christian i do not see the laws as a check list to achieve something, but that they are things that my Father finds pleasing, thus as His child I want to do them, although I know my attempts don't earn me anything. I just want to do that which pleases and honors my Father (a strange concept in our day).