What you don't know won't hurt you

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What you don't know won't hurt you.

 and What you don't know can't hurt you.
Prov. If you do not know about a problem or a misdeed, you will not be able to make yourself unhappy by worrying about it. (Often used to justify not telling someone about a problem or misdeed.) Ellen: What a beautiful diamond necklace! Thank you! But how on earth did you get the money to pay for it? Fred: What you don't know won't hurt you.
See also: hurt, know
References in periodicals archive ?
You know the saying, what you don't know can't hurt you.
You might feel what you don't know can't hurt you, but a higher interest rate could cost you thousands, and ID fraud can take years to sort out.
It is this point that feelings of terror and panic are replaced with a knowledge that what you don't know can't hurt you.
They say what you don't know can't hurt you, but a group of four Alaska high school students set out to disprove that.
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