For the musician, heaven and hell can be used as powerful metaphors that speak to the very core of human spiritual beliefs.

Walter's story serves as a powerful metaphor for how he actually feels".

"The river was a symptom of America's attitudes towards the underclass, a powerful, physical metaphor," he said.

His stories were full of lyrical use of the Turkish language through simple yet deep and powerful metaphors.

Like all powerful metaphors, Du Bois's came to have a life of its own.

"Stay the course" is a particularly powerful metaphor because it can activate so many of our emotions.

"Slavery" quickly became a powerful metaphor for those seeking the "emancipation" of workers or women.

It's a powerful metaphor for the business world.

"When you have a powerful metaphor, and everyone agrees on it, it is a very effective means of getting things accomplished."

The dropping of the fence lines was a powerful metaphor for the political changes taking place in South Africa at that time.