Rome wasn't built in a day

Cultural  

1. Valuable projects take time.

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Rome wasn't built in a day Idioms  

1. Important work takes time. This expression functions as an injunction or plea for someone to be patient. For example, You can't expect her to finish this project in the time allotted; Rome wasn't built in a day. This phrase was a French proverb in the late 1100s but was not recorded in English until 1545.

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Example Sentences

"They know Rome wasn't built in a day," Vance said in the key, blue-collar swing state of Pennsylvania on Tuesday.

From Barron's

And it’s, of course, because Rome wasn’t built in a day,” said Susanne Kluh, general manager for the Greater Los Angeles County Vector Control District.

From Los Angeles Times

The Harbaugh process needs to be trusted and Rome wasn’t built in a day.

From Los Angeles Times

“There’s many a slip betwixt cup and lip. Rome wasn’t built in a day.”

From Literature

“Rome wasn’t built in a day, but they’re doing a doggone good job, which I’m very thankful for,” tight end Logan Thomas said.

From Washington Times