what you don't know can't hurt you

Phrase

 * 1) If one does not know about a problem or a misdeed, one will not be able to render oneself unhappy by worrying about it.

Usage notes

 * Often used to justify not informing someone about a problem or misdeed.

Translations

 * Finnish: se mitä ei tiedä ei voi satuttaa
 * French: ce qu'on ignore ne peut pas nous faire de mal
 * Polish:
 * Swedish: ha ont av