 When enacting and advocating Cuban policy , Guevara cited the political philosopher Karl Marx as his ideological inspiration . In defending his political stance , Guevara confidently remarked that " There are truths so evident , so much a part of people 's knowledge , that it is now useless to discuss them . One ought to be Marxist with the same naturalness with which one is ' Newtonian ' in physics , or ' <unk> ' in biology . " According to Guevara , the " practical revolutionaries " of the Cuban Revolution had the goal of " simply fulfill ( ing ) laws foreseen by Marx , the scientist . " Using Marx 's predictions and system of dialectical materialism , Guevara professed that " The laws of Marxism are present in the events of the Cuban Revolution , independently of what its leaders profess or fully know of those laws from a theoretical point of view . " 
