害人之心不可有，防人之心不可無 [－－－－－－－－－－－－－－无]

Jyutping hoi6 jan4 zi1 sam1 bat1 ho2 jau5 ， fong4 jan4 zi1 sam1 bat1 ho2 mou4
Pinyin hài rén zhī xīn bù kě yǒu ， fáng rén zhī xīn bù kě wú

Definitions (Wiktionary)
  1. proverb
    one should not try to harm others, but you should also be prudent and guard against those who harm you

害人之心不可有，防人之心不可無 [－－－－－－－－－－－－－－无]

Jyutping hoi6 jan4 zi1 sam1 bat1 ho2 jau5, fong4 jan4 zi1 sam1 bat1 ho2 mou4
Pinyin hài rén zhī xīn bù kě yǒu , fáng rén zhī xīn bù kě wú

Definitions (CC-CEDICT)
  1. refrain from hurting others, yet guard against those trying to hurt you (proverb)