"念には念を入れよ" meaning in Japanese

{
  "forms": [
    {
      "form": "念には念を入れよ",
      "ruby": [
        [
          "念",
          "ねん"
        ],
        [
          "念",
          "ねん"
        ],
        [
          "入",
          "い"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nen ni wa nen o ireyo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "idiom",
        "2": "ねん に は ねん を いれよ"
      },
      "expansion": "念(ねん)には念(ねん)を入(い)れよ • (nen ni wa nen o ireyo)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "look before you leap, one should think twice before doing something"
      ],
      "id": "en-念には念を入れよ-ja-phrase-Fakd~MxI",
      "links": [
        [
          "look before you leap",
          "look before you leap"
        ],
        [
          "think twice",
          "think twice"
        ]
      ],
      "synonyms": [
        {
          "word": "念には念を入れる"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "念には念を入れよ"
}

{
  "forms": [
    {
      "form": "念には念を入れよ",
      "ruby": [
        [
          "念",
          "ねん"
        ],
        [
          "念",
          "ねん"
        ],
        [
          "入",
          "い"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nen ni wa nen o ireyo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "idiom",
        "2": "ねん に は ねん を いれよ"
      },
      "expansion": "念(ねん)には念(ねん)を入(い)れよ • (nen ni wa nen o ireyo)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese idioms",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with three Han script characters"
      ],
      "glosses": [
        "look before you leap, one should think twice before doing something"
      ],
      "links": [
        [
          "look before you leap",
          "look before you leap"
        ],
        [
          "think twice",
          "think twice"
        ]
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "念には念を入れる"
    }
  ],
  "word": "念には念を入れよ"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "念には念を入れよ"
  ],
  "section": "Japanese",
  "subsection": "idiom",
  "title": "念には念を入れよ",
  "trace": ""
}