"We are doing everything possible to give labor this new status of social duty and to link it on the one side with the development of a technology which will create the conditions for greater freedom, and on the other side with voluntary work based on a Marxist appreciation of the fact that man truly reaches a full human condition when he produces without being driven by the physical need to sell his labor as a commodity."
January 1, 1970
https://en.wikiquote.org/wiki/Che_Guevara