I wonder about the mind/minds I should say Chance favors those with a prepared mind or Chance favors only favor people with prepared minds, perhaps minds is p

I wonder about the mind/minds I should say Chance favors those with a prepared mind or Chance favors only favor people with prepared minds, perhaps minds is plural in Spanish an singular in English and this is reasoning? Can anyone confirm this reasoning or I am completely confuse? Edited: Gooling I found people with heads are smarter, so here they use the plural. So why mind and not minds. http://gnosticwarrior.com/head-size-matters.html http://gnosticwarrior.com/head-size-matters.html