If you are full of faith, there is no room for fear. Allowing fear to overcome us indicates a lack of adequate faith. That is not good advice for Christians. We learn to be content with what we have. The fearful are ranked with liars, the abominable, murderers and whoremongers, and are targeted for eternal destruction.
Fear is displaced, or cast out.
It is replaced by the love God has for us, our love for Him, and our love for one another. Faith is manifested by the lives we live. Faith is translated into action, and the love of God is seen by all in our attitude and service to those in need. Our lives show whether we are truly full of faith. Deceit and lying sprang from the heart of Satan.