"what you don't know can't hurt you" meaning in English

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      "args": {
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      "expansion": "what you don't know can't hurt you",
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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          "name": "English entries with incorrect language header",
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      ],
      "glosses": [
        "If one does not know about a problem or a misdeed, one will not be able to render oneself unhappy by worrying about it."
      ],
      "id": "en-what_you_don't_know_can't_hurt_you-en-phrase-M9RrWVxJ",
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "misdeed",
          "misdeed"
        ],
        [
          "unhappy",
          "unhappy"
        ]
      ],
      "related": [
        {
          "word": "out of sight, out of mind"
        },
        {
          "word": "ignorance is bliss"
        },
        {
          "word": "willful ignorance"
        },
        {
          "word": "long ways, long lies"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "se mitä ei tiedä ei voi satuttaa"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "ce qu’on ignore ne peut pas nous faire de mal"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "word": "czego oczy nie widzą, tego sercu nie żal"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "Translations",
          "word": "det man inte vet har man inte ont av"
        }
      ]
    }
  ],
  "word": "what you don't know can't hurt you"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
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      },
      "expansion": "what you don't know can't hurt you",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "out of sight, out of mind"
    },
    {
      "word": "ignorance is bliss"
    },
    {
      "word": "willful ignorance"
    },
    {
      "word": "long ways, long lies"
    }
  ],
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      "glosses": [
        "If one does not know about a problem or a misdeed, one will not be able to render oneself unhappy by worrying about it."
      ],
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "misdeed",
          "misdeed"
        ],
        [
          "unhappy",
          "unhappy"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "se mitä ei tiedä ei voi satuttaa"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "ce qu’on ignore ne peut pas nous faire de mal"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "word": "czego oczy nie widzą, tego sercu nie żal"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "Translations",
      "word": "det man inte vet har man inte ont av"
    }
  ],
  "word": "what you don't know can't hurt you"
}