Tullian Tchividjian has written a great post on how God doesn’t need your good works, but your neighbour does:
So, I’m all for effort, fighting sin, resisting temptation, mortification, working, activity, putting off, and putting on, as long as we understand that it is not our work for God, but God’s work for us, that has fully and finally set things right between God and sinners. Any talk of sanctification that leaves the impression that our efforts secure more of God’s love, itself needs to be mortified. We must always remind Christian’s that the good works which necessarily flow from faith are not part of a transaction with God–they are for others. The Reformation was launched by (and contained in) the idea that it’s not doing good works that make us right with God. Rather it’s the one to whom righteousness has been received that will do good works.
There’s so much more that can be said, but I hope this serves to clarify that my understanding of the Christian life is not “let go and let God” but “trust God and get going”–trust that, in Christ, God has settled all accounts between him and you and then “get going” in sacrificial service to your wife, your husband, your children, your friends, your enemies, and strangers.