Have you so much time to spare from your own affairs that you can attend to another man's with which you have no concern?

Those who in quarrels interpose, Must often wipe a bloody nose.

If everybody minded their own business, the Duchess said in a hoarse growl, the world would go round a deal faster than it does.

A person should be free to do as he likes in his own concerns; but he ought not to be free to do as he likes in acting for another, under the pretext that the affairs of the other are his own affairs.

For prying into any human affairs, none are equal to those whom it does not concern.

A man is likely to mind his own business when it is worth minding.