I'll start:
"The bourgeoisie has stripped of its halo every occupation hitherto honoured and looked up to with reverent awe. It has converted the physician, the lawyer, the priest, the poet, the man of science, into its paid wage labourers."
- Karl Marx, Friedrich Engels, in The Communist Manifesto.
"Go forward knowing that, sooner rather than later, the great avenues will open again where free people will walk to build a better society." ~ Salvador Allende