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Jyutping jyu4 jan4 jam2 seoi2 , laang5 nyun5 zi6 zi1
Pinyin rú rén yǐn shuǐ , lěng nuǎn zì zhī

Definitions (Wiktionary)
  1. proverb
    One must personally experience something in order to know what it's like.

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Jyutping jyu4 jan4 jam2 seoi2 , laang5 nyun5 zi6 zi1
Pinyin rú rén yǐn shuǐ , lěng nuǎn zì zhī

Definitions (CC-CEDICT)
  1. the person who drinks it knows best whether the water is hot or cold (Zen proverb); self-awareness comes from within
  2. to know best by personal experience