on second thought

Idioms  

1. Resulting from a revised opinion or change of mind, as in I thought I'd go to the movies, but on second thought I'd rather stay home. Similarly, have second thoughts means “change one's mind,” as in I've had second thoughts about moving to Florida. This idiom alludes to ideas that come later. [Mid-1600s]

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Example Sentences

On second thought, maybe the unruffled, dismissive response is the way to go.

From Los Angeles Times

On second thought, maybe that calls for something more formal.

From The Wall Street Journal

He was like, ‘Nah, I don’t think acting is my passion, but I’ll never forget those moments … You know what? On second thought, it depends on the script.’

From Los Angeles Times

But on second thought, no one is better at playing The Entitled Mean Girl than Bondi herself.

From Los Angeles Times

“Actually, on second thought, I shouldn’t leave you alone.”

From Literature