“Faith is simply the attitude of coming to God with empty hands. When a child asks his mother for something he needs, trusting that she will give it, his asking does not merit anything. It is merely the way he receives his mother’s generosity. This is crucial because, if you come to think that your belief is the cause of your salvation, you will stop looking at Christ and start looking at your faith. When you see doubts, it will rattle you. When you don’t feel it quite as clearly or excitedly, it will worry you. What has happened? You’ve turned your faith into a ‘work’! Faith is only the instrument by which you receive your salvation, not the cause of your salvation. If you don’t see this, you will think you have something to boast about: The reason I am saved is because I put my faith in Jesus. This is a subtle misunderstanding which cuts away our assurance, and boosts our pride. And verse 27 says the gospel leaves no basis for boasting.” - Tim Keller