水みず清きよければ魚うお棲すまず

expression

the morally upright have a hard time making friends; fish will not live in water that is (too) clean

Proverb meaning that a person who is too strict or pure may find it difficult to get along with others, just as overly clean water cannot sustain fish. Often used to advise flexibility or tolerance.

• 水みず清きよければ魚うお棲すまずというから、もう少すこし大おおらかになったほうがいいよ。

  As the saying goes, 'fish will not live in water that is too clean,' so you should be a bit more easygoing.