“Plato in some sense anticipated the Catholic realism, as attacked by the heretical nominalism, by insisting on the equally fundamental fact that ideas are realities; that ideas exist just as men exist. Plato however seemed sometimes almost to fancy that ideas exist as men do not exist; or that the men need hardly be considered where they conflict with the ideas.”

“Plato in some sense anticipated the Catholic realism, as attacked by the heretical nominalism, by insisting on the equally fundamental fact that ideas are realities; that ideas exist just as men exist. Plato however seemed sometimes almost to fancy that ideas exist as men do not exist; or that the men need hardly be considered where they conflict with the ideas.”

— Gilbert K. Chesterton