Complete serenity of mind is a gift of God; but this serenity is not given without our intense effort. You will achieve nothing by your own efforts alone; yet God will not give you anything, unless you work with all your strength. This is an unbreakable law.

—The Art of Prayer

Here is another example of faith manifesting itself in works. Do you see the faith behind the sentiment? The writer believes that God does work in our lives but that we have to do our part. Faith manifesting itself in action.