too much of a good thing
Too large an amount of a beneficial or useful thing or activity can be harmful or excessive. For example, The indoor decorations are fine but the outdoor Santa, sled, reindeer, gnomes—it's just too much of a good thing. Expressed in slightly different form even earlier, Shakespeare used this precise wording in praise of moderation in As You Like It (4:1): “Can one desire too much of a good thing?”
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As an example of good science-and-society policymaking, the history of fluoride may be more of a cautionary tale.
However much we gossip about heterosexual couples with large age gaps, we at least refrain from calling them sex offenders.
There is no such thing as speech so hateful or offensive it somehow “justifies” or “legitimizes” the use of violence.
“They sure took the Sony thing seriously,” Attkisson said dryly.Ex-CBS Reporter Sharyl Attkisson’s Battle Royale With the Feds|Lloyd Grove|January 9, 2015|DAILY BEAST
Between 25 and 30, you’re trying to decide how much longer before you start growing a beard and calling yourself ‘Daddy.
You would not think it too much to set the whole province in flames so that you could have your way with this wretched child.St. Martin's Summer|Rafael Sabatini
We resolved to do our best to merit the good opinion which we thus supposed them to entertain of us.
Edna did not reveal so much as all this to Madame Ratignolle that summer day when they sat with faces turned to the sea.The Awakening and Selected Short Stories|Kate Chopin
He was too drowsy to hold the thought more than a moment in his mind, much less to reflect upon it.The Wave|Algernon Blackwood
"There's just one thing I'd like to ask, if you don't mind," said Cynthia, coming suddenly out of a brown study.The Boarded-Up House|Augusta Huiell Seaman