单词mind-one-s-own-business
To mind one"s own business is not a form of thought, Mr. Mont, it"s an instinct.
各人管自己的事情并不是一种思想方式，孟特先生，这是本能。
And I think one does better to mind one"s own business.
我认为一个人还是少管闲事为好。
Mind one"s own business; occupy oneself with one"s own affairs; stop interfering with the affairs of other people
专心于自己的事；不要管别人的闲事