“God is our refuge and strength, a very present help in trouble. Therefore we will not fear though the earth gives way, though the mountains be moved into the heart of the sea.” Psalm 46:1-2
How can we defeat fear? Yes faith is the key to defeating fear. Because God is a very present help in times of trouble we need not fear.
In my head I see a scene from a movie. A building is burning. People find themselves on the balcony of this burning building. Will they jump to safety, as directed by the fire department? Well that depends. Do they believe the fire department will break their fall and provide them with safety? Behind them the fire rages. In front of them it would be a long way down. Will they jump? It all depends on their faith in that fire department and their setup.
To leap from the building requires faith. To act based upon what you believe also requires faith. Fear is the fire that tests your faith. Will your faith endure?