mind one's own business

Meaning: (idiomatic)To concern oneself only with what is of interest to oneself and not interfere in theaffairsofothers.I was just walking down the road,minding my own business, when I was attacked by a mugger.1846, “Moral Responsibilities”, inThe British Friend: A Monthly Journal Chiefly Devoted to the Interests of the Society of Friends‎[1], volume 4, number 8, page204:The idea is but too prevalent in almost every community, that a man has discharged his duties as a citizen, well enough, if heminds his own businessand does not meddle with the affairs of his neighbours. "Look out for Number One," is a great fundamental maxim, which is in every body's mouth, and which every body takes credit to himself for acting upon. It is preached to us sometimes from the pulpit even, and Christians, as well as infidels, pride themselves upon the assiduity with which they can look out for "Number One."1977, “Peaches”, performed bythe Stranglers:Strolling along,minding my own businessWell, there goes a girl and a half

Examples:

EN: The first rule in Switzerland is to mind one's own business.
ES: La primera regla en Suiza es que cada uno se ocupa de sus propios asuntos.
ID: Aturan pertama di Swiss adalah memikirkan urusannya sendiri.

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