“The devil you know....”
;-)
“The devil you know....”
This is a shortened version of the old proverb, ‘better the devil you know than the devil you don’t.’
This proverb is related in 1539, Adages out of Erasmus by R. Taverner, “nota res mala, opima,” which means “an evil thing known is best.”
Or, once known slay that devil.