The sky is the limit

Meaning

There are no bounds on what can be done.

Usage

Encourages expansive thinking.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Aviation and astronomy metaphors for endless possibilities.

Used widely since the early 20th-century aviation boom.