jemandem geht ein Licht auf

the penny drops; to suddenly understand

Origin

Based on the universal metaphor of light (insight as light); it appears already in the Bible (Matthew 4:16: "… a light has dawned").

Source

Building blocks

Words in this expression

Grammar that uses this word

Examples

  • Nach der dritten ging ihm ein auf.

    After the third explanation, the penny finally dropped for him.