build castles in the sky(redirected from build a castle in the sky)
build castles in the sky
To create dreams, hopes, or plans that are impossible, unrealistic, or have very little chance of succeeding. You need sound financial advice and a strong plan if you're going to start your own business—don't just build castles in the sky.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.