look before you leap
US /lʊk bɪˈfɔr ju lip/
UK /lʊk bɪˈfɔr ju lip/
1.
think carefully about what you are going to do before you do it, because once it is done, you cannot change it
:
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It's always wise to look before you leap when making big decisions.
•
Don't just quit your job without a plan; look before you leap.