"the best laid plans of mice and men often go awry" meaning in English

{
  "etymology_text": "From a Scots poem by Robert Burns, To a Mouse. In the original Scots, the lines are, “The best-laid schemes o’ mice an’ men / Gang aft agley”.",
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      "expansion": "the best laid plans of mice and men often go awry",
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  "lang": "English",
  "lang_code": "en",
  "pos": "proverb",
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      "examples": [
        {
          "ref": "1785, Robert Burns, To a Mouse:",
          "text": "But mouse, you are not alone,\nIn proving foresight may be vain;\nThe best laid schemes of mice and men go often askew\nAnd leave us nothing but grief and pain,\nFor promised joy!",
          "type": "quote"
        },
        {
          "ref": "1971, Neal Cassady, “Letter to Jack Kerouac, March 7, 1947”, in The First Third, City Lights, page 125:",
          "text": "Knowing her supremely perfect being was completely mine […] I could conceive of no obstacle to my satisfaction, well, “the best laid plans of mice & men go astray” and my nemesis was her sister, the bitch.",
          "type": "quote"
        }
      ],
      "glosses": [
        "No matter how well a project is planned, accidents or misfortune can still occur."
      ],
      "id": "en-the_best_laid_plans_of_mice_and_men_often_go_awry-en-proverb-RtLdXi65",
      "links": [
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          "project",
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        [
          "accident",
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          "misfortune",
          "misfortune"
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        [
          "occur",
          "occur"
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      "related": [
        {
          "word": "agley § Usage notes"
        },
        {
          "word": "accidents will happen in the best regulated families"
        }
      ],
      "synonyms": [
        {
          "word": "man plans and God laughs"
        },
        {
          "word": "man proposes, God disposes"
        },
        {
          "word": "the best laid plans of mice and men go oft astray"
        }
      ]
    }
  ],
  "word": "the best laid plans of mice and men often go awry"
}

{
  "etymology_text": "From a Scots poem by Robert Burns, To a Mouse. In the original Scots, the lines are, “The best-laid schemes o’ mice an’ men / Gang aft agley”.",
  "head_templates": [
    {
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      "expansion": "the best laid plans of mice and men often go awry",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "proverb",
  "related": [
    {
      "word": "agley § Usage notes"
    },
    {
      "word": "accidents will happen in the best regulated families"
    }
  ],
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      "examples": [
        {
          "ref": "1785, Robert Burns, To a Mouse:",
          "text": "But mouse, you are not alone,\nIn proving foresight may be vain;\nThe best laid schemes of mice and men go often askew\nAnd leave us nothing but grief and pain,\nFor promised joy!",
          "type": "quote"
        },
        {
          "ref": "1971, Neal Cassady, “Letter to Jack Kerouac, March 7, 1947”, in The First Third, City Lights, page 125:",
          "text": "Knowing her supremely perfect being was completely mine […] I could conceive of no obstacle to my satisfaction, well, “the best laid plans of mice & men go astray” and my nemesis was her sister, the bitch.",
          "type": "quote"
        }
      ],
      "glosses": [
        "No matter how well a project is planned, accidents or misfortune can still occur."
      ],
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          "project",
          "project"
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          "accident",
          "accident"
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  "synonyms": [
    {
      "word": "man plans and God laughs"
    },
    {
      "word": "man proposes, God disposes"
    },
    {
      "word": "the best laid plans of mice and men go oft astray"
    }
  ],
  "word": "the best laid plans of mice and men often go awry"
}