Ephesians 6:16 says, 'Above all, taking the shield of faith...'.
That means it is very important. It will quench the fiery darts like nothing else can.
I don't want to forget faith today. Jesus' faith has become my faith. 'The Faith' is the faith of the Son of God. If it is held in front of us it will protect us from thoughts or words shot in our direction.
'Above all taking' not once... all the time. If we realize we have put it down we pick it up again and bring it into the next thing.