Kevin DeYoung has a good illustration regarding the role faith plays in our salvation. He speaks of walking out on frozen Lake Michigan. The initial step out onto the frozen lake is an act of faith, but it is not his faith that keeps him from falling into freezing water but the thickness of the ice (Kevin DeYoung, The Good News We Almost Forgot: Rediscovering the Gospel in a 16th Century Catechism [Chicago: Moody Publishers, 2010], 117). So too with us, it is not our faith that saves us, but it is the confidence we have in the work of Jesus that saves us. And that is the gift Paul is talking about in Ephesians 2. There is nothing we do that makes us right with God; it is all a work of God.