Mind (one's) own business spoken language verb phrase
To take care of their affairs and not interfere in others'.
Can you just mind your own business? I can take care of my things.
Stop bothering me, mind your own business.
Don't ask me about the things between Jane and me anymore. Mind your own business.
Jane! I would appreciate that you leave me alone and mind your own business.
It is mostly used in the present tense.
Enthusiasm and perseverance
Work with fire in your belly, then success will chase you.