What is the origin of the idiom "the scales fall from one's eyes" and when to use it?

The idiom "the scales fall from one's eyes" has biblical origins and can be found in the Bible, specifically in the New Testament. It is used metaphorically to describe a moment of sudden realization or enlightenment. The phrase is often associated with the story of the conversion of the Apostle Paul (Saul of Tarsus) in the Book of Acts (Acts 9:18), where it is said that scales fell from his eyes, and he regained his sight after encountering a divine vision. This expression is used to describe a moment when someone gains a new and clearer understanding of a situation, concept, or truth. It signifies a transformative experience where ignorance or misunderstanding is replaced by insight and awareness.