Nature is man's inorganic body -- that is to say, nature insofar as it is not the human body. Man lives from nature -- i.e., nature is his body -- and he must maintain a continuing dialogue with it is he is not to die. To say that man's physical and mental life is linked to nature simply means that nature is linked to itself, for man is a part of nature.
Karl MarxThe whole proletariat must be armed at once with muskets, rifles, cannon and ammunition, and the revival of the old-style citizens militia, directed against the workers, must be opposed.
Karl MarxMachines were, it may be said, the weapon employed by the capitalists to quell the revolt of specialized labor.
Karl Marx