When your brain becomes overwhelmed by anxious thoughts, your ability to reason and use your creative intelligence shuts down. Fear is like a cold fog that spreads throughout your entire thinking, taking away your light and resources as it goes.
Thinking of fear in this way reminds me of the dementors in the Harry Potter stories. Harry had to learn to deal with them by strongly nurturing a positive thought that could then turn into the charm that repels them. He couldn’t ignore them or busy himself with other things - he had to face up and fight back in a very specific and focused way.
I think we can learn a great deal from this. Facing our fears requires courage and it requires specific action if we are to regain control of our mind and begin to feel calm and useful again.