discretion is the better part of valor

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释义
小心驶得万年船；谨慎即大勇
It is often wise to refrain from seemingly brave speech or action.

例句
Jimmy: Don't be too tough on yourself. Like they say, discretion is the better part of valor. (Better Call Saul)
吉米：别太责备自己。俗话说，谨慎即大勇。（风骚律师）