The Williams New Testament knocks it out of the park again.
And how does Williams render verse 6? "For in union with Christ Jesus neither circumcision nor the lack of it counts for anything; but only faith that is spurred on to action by love." Notice: "that is spurred on to action." This represents the voice of the Greek perfectly. Christianity is not only a life of faith. It is a life in the Spirit. And it is the Holy Spirit in us -- and the Holy Spirit alone -- who produces good works of love.
The faith that saves is a faith that issues forth in love -- always!