用心ようじんするに如しくはない

expression, i-adjective

caution is the best policy; better safe than sorry

Proverb emphasizing that being careful is always the wisest course of action. Often used as a standalone piece of advice.

• 旅りょ行こうの前まえには、用よう心じんするに如しくはないから、持もち物ものをよく確かく認にんしよう。

  Before a trip, it's best to be cautious, so let's double-check our belongings.

• 知しらない人ひとからメールが来きたら、用よう心じんするに如しくはない。

  When you get an email from a stranger, it's better to be safe than sorry.