擇善固執 [择－－执]

Jyutping zaak6 sin6 gu3 zap1
Pinyin zé shàn gù zhí

Definitions (CC-CEDICT)
  1. to choose what is good and hold fast to it (idiom)
Definitions (粵典–words.hk)
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Definitions (Wiktionary)
  1. phrase, idiomatic
    to insist on the righteous cause