Marx's use of the words 'work' and 'labour' in the section above may be unequivocally negative; but this was not always the case, and is most strongly found in his early writing. However, Marx was always clear that under capitalism, labour was something inhuman, and dehumanising. 'labour is external to the worker – i.e., does not belong to his essential being; that he, therefore, does not confirm himself in his work, but denies himself, feels miserable and not happy, does not develop free mental and physical energy, but mortifies his flesh and ruins his mind' . While under communism, 'In the individual expression of my life I would have directly created your expression of your life, and therefore in my individual activity I would have directly confirmed and realised my true nature, my human nature, my communal nature' .