Curiosity killed the cat is a misunderstood and misinterpreted quote we use most often which misleads people in the direction of not being curious.
How the quote “curiosity killed the cat’ is used
We use this quote often to discourage people form being overly curious about something specific, mostly about their personal affairs.
This also works as a warning of the threats of unnecessary over investigation of anything which needs to be stay simple and not make it complex by over analyzing it.
I bet many of you may have heard this quote when you were a young child, as kids often ask unnecessary way too many questions.

Related: Money Is The Root Of All Evil
Another quote with totally different meaning
The real meaning
The real quote, however, is:
Curiosity killed the cat, but satisfaction brought it back
The true meaning of this quote is actually the exact opposite of what most people know it to mean.
The real meaning of this quote actually encourages people to be curious instead of killing their curiosity, especially when it is about learning something new.
The first half of the quote is kind of a warning but the second half of the quote is kind of a relief that there is no such thing like too many questions.
Since, curiosity is the thing that let’s to inventions and that let children think on their own and grow in the process.
So it kind of create a balance with the first half as a warning and the second as a relief.
Related: Blood Is thicker than the water Full Quote
Another misinterpreted quote that has a different meaning too
“Curiosity Killed the cat But” Quotes
Curiosity killed the cat, but the satisfaction brought it back.
Eugene O’Neill
Curiosity killed the cat, but when human are concerned, the only thing a healthy curiosity can kill is ignorance.
Harry Lorayne

Curiosity exists for a reason.
Albert Einstein
What though care killed a cat, thou hast mettle enough in thee to kill care.
William Shakespeare
And didn’t they say that, although curiosity killed the cat, satisfaction brought the beast back?
Stephen King
Curiosity may have killed the cat, but it sure saved my ass.
Michael J. Fox
Create a hell and people will be so impatient to get there, just out of their curiosity
Bangambiki Habyarimana

Fear of curiosity kills the cat … slowly very slowly.
Brian Spellman
We are told that Curiosity killed the cat. It indeed and the name of that cat was Ignorance.
Richard Gillett,
Read a related book – Curiosity killed the cat (Poison Apple #7)