From Longman Dictionary of Contemporary Englishmind over mattermind over matterCONTROLused to say that you can use your thoughts to control physical feelings or an unpleasant situation I’m scared, yes, but it’s a case of mind over matter. → mind
Examples from the Corpus
mind over matter• But mind over matter, I can do it if I really want to, and I will.• He says it's just a case of mind over matter.• There are limits, in other words, to mind over matter. 