know (one's) own mind

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know (one's) own mind

To be firmly resolute and confident in one's ideas, intentions, plans, or opinions. I've never worried too much about the effects of peer pressure on Kelly, as she really knows her own mind on what's right or wrong.
See also: know, mind, own

know your own mind

be decisive and certain.
See also: know, mind, own

know your own ˈmind

know what you want or like: At 25 you’re old enough to know your own mind and make these decisions for yourself.
See also: know, mind, own