Create a metaphor for fear. Output the metaphor.
Fear is a storm that rages within, brewing thunderous thoughts and flashes of doubt that can shake the foundations of our courage.
Complete the following task based on the instruction and optional input provided.### Instruction:
Create a metaphor for fear. Output the metaphor.

### Output:
Fear is a storm that rages within, brewing thunderous thoughts and flashes of doubt that can shake the foundations of our courage.