Famous quotes containing the words system and/or theory:
“Ethics and religion differ herein; that the one is the system of human duties commencing from man; the other, from God. Religion includes the personality of God; Ethics does not.”
—Ralph Waldo Emerson (1803–1882)
“The theory of the Communists may be summed up in the single sentence: Abolition of private property.”
—Karl Marx (1818–1883)