Mas vale bueno por conocido que malo por conocer in English?

Más vale lo viejo conocido que lo nuevo por conocer. ---- This is the shortened form of the full idiom, 'better the devil you know than the devil you don't', and means that it is often better to deal with someone or something you are familiar with and know, even if they are not ideal, than take a risk with an unknown person or thing.

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