Here's a breakdown of why:
* Dark: Represents the lack of hope, clarity, or light in a situation. It suggests a feeling of being lost or overwhelmed.
* Desolate: Implies emptiness, isolation, and a lack of comfort or support.
Examples in Speech:
* "After my divorce, I felt like I was walking through a dark and desolate valley."
* "The country was struggling through a dark and desolate valley of economic hardship."
* "Losing my job was a dark and desolate valley, but I eventually found my way out."
The metaphor is powerful because it evokes a sense of being lost, alone, and without direction. It is often used to describe difficult times in life, both personal and societal.