Why do those who deny faith alone always try to hide behind that statement? It doesn't work.
Romans 4:5 But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.
That passage is NOT talking about works of the "Mosaic Law". Both chapter 4 and 5 speak of faith alone prior to any actions is what saved. In fact in chapter 4 Paul shows that it was faith that saved before circumcision and that circumcision was only a sign of that faith. Any action after that saving faith is only a sign of that faith. To try to take credit for what God is doing through us is arrogance.